This tail refactor turned into an organ refactor. Funny how that works. (#67017)

* Fuck you (refactors ur tails)

* Errors

* Wow. Pain.

* Fixes up probably everything

* finish up here

* Fixes hard del maybe

* original owner hard del

* garbage collection runtime

* suck my peen byond

* Mapped tails

* motherfucker.

* motherrfucker. again.

* Whooopppppsie

* yeah bad idea

* Turns out external organs literally just sat in nullspace forever if their parent was deleted, and didnt Remove() themselves, causing harddels.

* So anyways I repathed all organs

* Fixes

* really.

* unit test... test

* unit test-test but it passes linters this time because im a moh-ron

* I've lost track of what im doing at this point

* Hopefully fixes hard del?

* meh

* Update code/datums/dna.dm

* things n stuff

* repath from master pull

code/modules/spells/spell_types/lichdom.dm

@@ -54,7 +54,7 @@
 
 		if(iscarbon(caster))
 			var/mob/living/carbon/carbon_caster = caster
-			var/obj/item/organ/brain/lich_brain = carbon_caster.getorganslot(ORGAN_SLOT_BRAIN)
+			var/obj/item/organ/internal/brain/lich_brain = carbon_caster.getorganslot(ORGAN_SLOT_BRAIN)
 			if(lich_brain) // This prevents MMIs being used to stop lich revives
 				lich_brain.organ_flags &= ~ORGAN_VITAL
 				lich_brain.decoy_override = TRUE