Summary

Adds support for Transport_Drones_Continued
Transport_Drones_Continued seems to be the most actively supported transport drone fork. Meglinge fork says that it can corrupt save games, so I think Continued is the safer target.
The Continued fork is close enough to the old Transport Drones setup that most of the Nullius compatibility work is mechanical.
Continued does add a few new items and capabilities though, e.g active-depot, storage-depot, drone-dispatcher, depot priorities, and depots that can act as logistic containers. But the new items are similar enough to make recipe selection easy.

Changes & Notes

Supersedes https://github.com/GregorSamsanite/nullius/pull/73
Added support for Transport_Drones_Continued.
Disallowed Transport_Drones_Meglinge_Fork and Transport_Drones. Given the names are so close, this makes it clearer to users what is currently supported. I also don't think its worth the effort to try support Transport_Drones_Meglinge_Fork yet until it looks active again.
Made the Nullius recipe overrides code more explicit. It is a bit more code, but should be more robust if the mod changes again or if other forks need support later.
Added recipes for the Continued-only items: active-depot, storage-depot, and drone-dispatcher.
Made fast-road its own tech, matching how Transport_Drones_Continued handles it.
Kept fast-road expensive because this matches the existing Nullius recipe choice, though it might still be worth discussing whether it should use regular boxed concrete instead of boxed black concrete. TODO
Continued currently has a quality GUI item & minor road mining bug. I've got a patch I'm trying to submit there to get those fixed.

Detail

Logistics Support

Continued lets depots act as logistic containers. The tech placement now follows the Nullius logistics progression rather than making those capabilities available too early.

transport-active-supply requires transport-buffering and nullius-distribution-2.
transport-logistics requires transport-active-supply and nullius-logistic-robot-1 when active/storage depot unlocks are enabled.
If transport-active-supply has no effects because the relevant depots are disabled (in Continued's settings), transport-logistics falls back to requiring transport-buffering, nullius-distribution-2, and nullius-logistic-robot-1.
Moving logistics after distribution 2 makes the most sense because that is where the matching Nullius logistic chest types become available.
It could be argued that logistic depots should take equivalent logistic chests in their recipes, but that means people who do not enable logistics support still pay for that cost. I left the recipes simpler, and matching the original Nullius ones, rather than adding setting-dependent recipe branches.

Tech / Recipe Gating

transport-system unlocks transport-drone, supply-depot, and road.
transport-system requires nullius-robotics-1, nullius-personal-transportation-1, and nullius-checkpoint-compressed-nitrogen.
This covers hangars/control components and also nullius-car-1, which is needed for the transport-drone recipe.
transport-fluids unlocks fluid-depot and request-depot.
transport-fluids requires transport-system and nullius-pumping-2.
This covers the base depot path and the Nullius fluid-handling parts.
transport-buffering unlocks buffer-depot, fuel-depot, and optionally drone-dispatcher.
transport-buffering requires transport-fluids, because buffer-depot takes request-depot, and fuel-depot takes buffer-depot.
transport-depot-circuits unlocks road-network-reader, transport-depot-reader, and transport-depot-writer.
transport-depot-circuits remains after transport-system and nullius-broadcasting-1.
fast-road unlocks fast-road.
fast-road requires transport-drone-speed-3, transport-depot-circuits, nullius-packaging-4, and nullius-aesthetics-2.
This covers speed progression, road-network-reader, boxed black concrete, and colored concrete production.

Recipe Comparison

After this PR

Named Recipes

Recipe	Category	Time	Ingredients	Result
`road`	`hand-casting`	`3s`	`1 nullius-rubber`, `1 nullius-land-fill-sand`, `3 nullius-gravel`	`4 road`
`transport-drone`	`medium-crafting`	`10s`	`1 nullius-car-1`, `5 arithmetic-combinator`, `2 programmable-speaker`, `3 bob-turbo-inserter`	`3 transport-drone`
`supply-depot`	`large-crafting`	`12s`	`1 nullius-large-chest-1`, `4 nullius-steel-beam`, `2 nullius-glass`, `1 train-stop`	`1 supply-depot`
`request-depot`	`large-crafting`	`6s`	`1 fluid-depot`, `1 nullius-hangar-1`	`1 request-depot`
`buffer-depot`	`large-crafting`	`4s`	`1 request-depot`, `1 train-stop`	`1 buffer-depot`
`fluid-depot`	`large-crafting`	`4s`	`1 supply-depot`, `1 nullius-medium-tank-2`, `1 nullius-barrel-pump-1`	`1 fluid-depot`
`fuel-depot`	`large-crafting`	`4s`	`1 buffer-depot`, `2 nullius-pump-2`	`1 fuel-depot`
`active-depot`	`large-crafting`	`8s`	`1 supply-depot`, `1 nullius-large-supply-chest-1`, `1 nullius-hangar-1`, `4 nullius-green-wire`	`1 active-depot`
`storage-depot`	`large-crafting`	`8s`	`1 supply-depot`, `1 nullius-large-storage-chest-1`, `2 nullius-red-wire`, `2 nullius-green-wire`	`1 storage-depot`
`drone-dispatcher`	`large-crafting`	`8s`	`1 fuel-depot`, `1 nullius-hangar-1`, `2 arithmetic-combinator`, `4 nullius-green-wire`	`1 drone-dispatcher`
`road-network-reader`	`small-crafting`	`5s`	`1 rail-chain-signal`, `1 nullius-sensor-1`, `1 programmable-speaker`	`1 road-network-reader`
`transport-depot-reader`	`small-crafting`	`2s`	`1 road-network-reader`, `2 nullius-red-wire`	`1 transport-depot-reader`
`transport-depot-writer`	`small-crafting`	`3s`	`1 road-network-reader`, `3 nullius-green-wire`	`1 transport-depot-writer`
`fast-road`	`large-crafting`	`30s`	`50 road`, `6 nullius-box-black-concrete`, `1 road-network-reader`	`8 fast-road`

Generated Recipes

Recipe Family	Final Nullius Shape
`request-<item>`	Fuel fluid ingredient is rebuilt to `15000`; result is `3 x 50000 <item>`; `600s`; `overload_multiplier = 40`; `allow_quality = false` when `quality` is not loaded
`request-<fluid>`	Fuel fluid ingredient is rebuilt to `15000`; result is `500000 <fluid>`; `600s`; `overload_multiplier = 40`
`fuel-depots`	If a `transport-drone` item ingredient exists, its amount becomes `1`; `energy_required = 60`; `overload_multiplier = 40`; fuel fluid ingredient is otherwise preserved

Transport Drones in Nullius before changes

Named Recipes

Recipe	Category	Time	Ingredients	Result
`road`	`hand-casting`	`3s`	`1 nullius-rubber`, `1 nullius-land-fill-sand`, `3 nullius-gravel`	`4 road`
`transport-drone`	`medium-crafting`	`10s`	`1 nullius-car-1`, `5 arithmetic-combinator`, `2 programmable-speaker`, `3 bob-turbo-inserter`	`3 transport-drone`
`supply-depot`	`large-crafting`	`12s`	`1 nullius-large-chest-1`, `4 nullius-steel-beam`, `2 nullius-glass`, `1 train-stop`	`1 supply-depot`
`request-depot`	`large-crafting`	`6s`	`1 fluid-depot`, `1 nullius-hangar-1`	`1 request-depot`
`buffer-depot`	`large-crafting`	`4s`	`1 request-depot`, `1 train-stop`	`1 buffer-depot`
`fluid-depot`	`large-crafting`	`4s`	`1 supply-depot`, `1 nullius-medium-tank-2`, `1 nullius-barrel-pump-1`	`1 fluid-depot`
`fuel-depot`	`large-crafting`	`4s`	`1 buffer-depot`, `2 nullius-pump-2`	`1 fuel-depot`
`road-network-reader`	`small-crafting`	`5s`	`1 rail-chain-signal`, `1 nullius-sensor-1`, `1 programmable-speaker`	`1 road-network-reader`
`transport-depot-reader`	`small-crafting`	`2s`	`1 road-network-reader`, `2 nullius-red-wire`	`1 transport-depot-reader`
`transport-depot-writer`	`small-crafting`	`3s`	`1 road-network-reader`, `3 nullius-green-wire`	`1 transport-depot-writer`
`fast-road`	`large-crafting`	`30s`	`50 road`, `6 nullius-box-black-concrete`, `1 road-network-reader`	`8 fast-road`

Not in original Nullius / Transport Drones

Recipe
`active-depot`
`storage-depot`
`drone-dispatcher`

Generated Recipes

Recipe Family	Baseline Nullius Shape
`request-<item>`	Fuel fluid ingredient slot 2 is changed to `15000`; result is `3 x 50000 <item>`; `600s`; `overload_multiplier = 40`
`request-<fluid>`	Fuel fluid ingredient slot 2 is changed to `15000`; result amount becomes `500000 <fluid>`; `600s`; `overload_multiplier = 40`
`fuel-depots`	Ingredient slot 1 is changed to amount `1`; `energy_required = 60`; `overload_multiplier = 40`

Tech Comparison

Pack shorthand:

Shorthand	Pack
Geo	`nullius-geology-pack`
Clim	`nullius-climatology-pack`
Mech	`nullius-mechanical-pack`
Elec	`nullius-electrical-pack`
Chem	`nullius-chemical-pack`
Phys	`nullius-physics-pack`
Astro	`nullius-astronomy-pack`

After this PR

Tech	Prerequisites	Research ingredients	Count	Time
`transport-system`	`nullius-robotics-1`, `nullius-personal-transportation-1`, `nullius-checkpoint-compressed-nitrogen`	Geo, Clim, Mech, Elec	100	30
`transport-fluids`	`transport-system`, `nullius-pumping-2`	Geo, Clim, Mech, Elec, Chem	150	30
`transport-buffering`	`transport-fluids`	Geo, Clim, Mech, Elec, Chem	300	30
`transport-active-supply`	`transport-buffering`, `nullius-distribution-2`	Geo, Clim, Mech, Elec, Chem	500	30
`transport-logistics`	`transport-active-supply`, `nullius-logistic-robot-1`	Geo, Clim, Mech, Elec, Chem	300	30
`transport-multi-pipe`	`transport-fluids`, `nullius-pumping-2`	Geo, Clim, Mech, Elec, Chem	300	30
`transport-depot-circuits`	`transport-system`, `nullius-broadcasting-1`	Geo, Clim, Mech, Elec	80	30
`transport-drone-speed-1`	`nullius-robot-speed-1`	Geo, Clim, Mech, Elec	200	30
`transport-drone-capacity-1`	`transport-drone-speed-1`, `nullius-braking-1`	Geo, Clim, Mech, Elec	250	30
`transport-drone-speed-2`	`nullius-robot-speed-2`, `nullius-checkpoint-truck`	Geo, Clim, Mech, Elec, Chem	800	35
`transport-drone-capacity-2`	`transport-drone-speed-2`, `nullius-robot-cargo-1`	Geo, Clim, Mech, Elec, Chem	1000	35
`transport-drone-speed-3`	`transport-drone-capacity-3`, `nullius-robot-speed-3`	Geo, Clim, Mech, Elec, Chem, Phys	1600	45
`fast-road`	`transport-drone-speed-3`, `transport-depot-circuits`, `nullius-packaging-4`, `nullius-aesthetics-2`	Geo, Clim, Mech, Elec, Chem, Phys	1600	45
`transport-drone-capacity-3`	`nullius-mechanical-engineering-2`	Geo, Clim, Mech, Elec, Chem, Phys	1600	45
`transport-drone-speed-4`	`nullius-personal-transportation-3`, `nullius-robot-speed-4`	Geo, Clim, Mech, Elec, Chem, Phys	4200	55
`transport-drone-capacity-4`	`transport-drone-speed-4`, `nullius-braking-8`	Geo, Clim, Mech, Elec, Chem, Phys	4500	55
`transport-drone-speed-5+`	`nullius-robot-speed-5`	Geo, Clim, Mech, Elec, Chem, Phys, Astro	`(2^(L-5))*15000`	60
`transport-drone-capacity-5`	`nullius-inserter-capacity-7`	Geo, Clim, Mech, Elec, Chem, Phys, Astro	25000	60

Transport Drones in Nullius before changes

Tech	Prerequisites	Research ingredients	Count	Time
`transport-system`	`nullius-robotics-1`, `nullius-checkpoint-compressed-nitrogen`	Geo, Clim, Mech, Elec	100	30
`transport-depot-circuits`	`transport-system`, `nullius-broadcasting-1`	Geo, Clim, Mech, Elec	80	30
`transport-drone-speed-1`	`nullius-robot-speed-1`	Geo, Clim, Mech, Elec	200	30
`transport-drone-capacity-1`	`transport-drone-speed-1`, `nullius-braking-1`	Geo, Clim, Mech, Elec	250	30
`transport-drone-speed-2`	`nullius-robot-speed-2`, `nullius-checkpoint-truck`	Geo, Clim, Mech, Elec, Chem	800	35
`transport-drone-capacity-2`	`transport-drone-speed-2`, `nullius-robot-cargo-1`	Geo, Clim, Mech, Elec, Chem	1000	35
`transport-drone-speed-3`	`transport-drone-capacity-3`, `nullius-robot-speed-3`	Geo, Clim, Mech, Elec, Chem, Phys	1600	45
`transport-drone-capacity-3`	`nullius-mechanical-engineering-2`	Geo, Clim, Mech, Elec, Chem, Phys	1600	45
`transport-drone-speed-4`	`nullius-personal-transportation-3`, `nullius-robot-speed-4`	Geo, Clim, Mech, Elec, Chem, Phys	4200	55
`transport-drone-capacity-4`	`transport-drone-speed-4`, `nullius-braking-8`	Geo, Clim, Mech, Elec, Chem, Phys	4500	55
`transport-drone-speed-5+`	`nullius-robot-speed-5`	Geo, Clim, Mech, Elec, Chem, Phys, Astro	`(2^(L-5))*15000`	60
`transport-drone-capacity-5`	`nullius-inserter-capacity-7`	Geo, Clim, Mech, Elec, Chem, Phys, Astro	25000	60