[ETF] Entity Texture Features

[6.2.6]

• update to minecraft 1.21.2+
• added the minecraftVersion property to vary textures based on the current minecraft version, supports ranges e.g. 1.17-1.18.2
• due to armor texture location changes emissive trims can now be found at
  • textures/trims/entity/humanoid/<trim_type>_<material>_e.png
  • textures/trims/entity/humanoid_leggings/<trim_type>_<material>_e.png
  • e.g. textures/trims/entity/humanoid_leggings/rib_redstone_e.png
  • this may yet be reverted if OptiFine opts to keep the old directory