[ETF] Entity Texture Features

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