ConnectedTexturesMod for Fabric

Fix JSON model CTM overrides

Fix incompatibility with Indium and Canvas

Fix possible crash with empty config file

Optimize rendering and resource loading

Technical changes:

Remove NotNullType and replace with NotNull
Create new config if file is empty
Optimize and fix model wrapping
Split unbaked model types
Pass ModelInfo instead of entire model when baking
Don't make texture if metadata isn't present
Use fallback when building a mesh if texture isn't present
Remove RegionCache
Merge BitUtil into RenderUtil
Move texture creation to TextureUtil