This PR replaces carps and sharks sprites. by thread https://forums.aurorastation.org/topic/11503-space-carpspace-shark-aesthetic-change/
Replaces carp/shark sprites
Moves shark sprites into animal.dmi file. Removes spaceshark.dmi
Old sprites of carp and shark remain. Also made a new mobs that uses old carp and shark sprites
Moves all NPC sprite files into icons/mob/npc folder, for organization.
Updates all paths.
This pr makes xenomorphs less awful via some additions and porting some fixes:
-removes the NO_MINOR_CUT that is not used anywhere and replace with NO_EMBED that stops things from embedding into mobs, like xenomorphs, shadow people and golems
-adds the night vision verbs to xenomorphs
-fixes aliens eggs layers behind under their weeds
-fixes some hud things missing
-makes their limbs unbreakable
This should make them a bit less buggy.
