[ETF] Entity Texture Features

fixed a possible recursion crash with the config

• fixed 3d skin layers mod & etf skin feature, compat for the 1.6 update (also removed log warning spam for future changes to 3d skin layers).
• restructured the config
• generified the emissive and enchanted pixel rendering methods
• the mini entities in mob spawners UUID's should now always use the following format in nbt ("[I;?,?,12345,12345]") making them identifiable for randomisation, the blocks property should also return the actual mob spawner block.

mob spawner entities can now variate their textures again. moved some temporary 5.0 rework code into more compatible mixins for better compatibility more stable implementation of the 5.0 rework changes for emissives, fixing a few crashes random properties now also allow ranges with the format <high>-<low> instead of only <low>-<high> (OptiFine parity) fixed a crash in the skin tool fixed a shoulder parrot crash fixed a crash with Xaeros minimap