limb grower shadekin limbs, design enhancements (#5967)

## About The Pull Request
- [x] Adds shadekin eyes and ears to the limb grower.
- [x] Makes the various species parts available upon research without
having to print 8 different design disks
- [x] Adjust pricing of some bodyparts to be similar to base human parts
- [x] Adds adaptable lungs as researchable expansion for limb grower

## Why It's Good For The Game

Quality of life. Having to print the design disks alongside the limb
grower is pointless, it costs next to nothing materials wise and takes a
bunch of inventory space to do it.

## Changelog

🆑 LT3
add: Added shadekin eyes and ears to limb grower
qol: Limb grower automatically includes species parts, no more species
disks required
add: Adaptive hot/oxy/tox lungs can now be printed from the limb grower
once researched
/🆑

---------

Co-authored-by: Alexis <catmc8565@gmail.com>

code/modules/research/techweb/nodes/biology_nodes.dm

@@ -39,10 +39,12 @@
 	design_ids = list(
 		"xenobioconsole",
 		"slime_scanner",
+		/* BUBBER EDIT REMOVE - LIMB GROWERS INCLUDE ALL LIMB TYPES
 		"limbdesign_ethereal",
 		"limbdesign_felinid",
 		"limbdesign_lizard",
 		"limbdesign_plasmaman",
+		*/
 	)
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_3_POINTS)
 	discount_experiments = list(/datum/experiment/scanning/cytology/slime = TECHWEB_TIER_3_POINTS)