AttributeRenderingLibrary

match GetOrCreateMesh between items and behaviors

Merge pull request #2 from BowlSoldier/RespectItemstackTextures

chore: use FindByVariant's bool return value to tell whether a match was found

apply appendix and prefix to overlays when possible

fix: Itemstack Textures will now always be used over Shape textures, for both Attachment and Texture behavior