[ETF] Entity Texture Features

• fixed entities in gui in 1.21.6+
• fixed extreme lag caused when un-leashing entities in 1.21.5+ caused by invalid leash data breaking nbt reading1.20
• fixed entity nbt tests in 1.21.5+
• changed nbt list testing behaviour allowing consistent behaviour with uses like nbt.1.list.* and nbt.1.list.*.further.instructions matching optifine
• reduce nbt crash log spam when entity is null
• large restructure of the source code
• first release for 1.20 in a while
• fixed a crash when illegal paths were enabled
• fixed minecart random textures
• fixed several crashes

• updated to 1.21.6

• fixed some debug log spam when nbt properties were tested

• fixed an NBT property issue with the first 1.21.5 build
• supported Forge and NeoForge 1.21.5

1.21.5 pre

• fixed an issue breaking ETF skin features in 1.21.4 after skins were changed