gltf scene and model loader for rend3.

This crate attempts to map the concepts into gltf as best it can into rend3, but there is quite a variety of things that would be insane to properly represent.

To "just load a gltf/glb", look at the documentation for [load_gltf] and use the default [filesystem_io_func].

Individual components of a gltf can be loaded with the other functions in this crate.

Supported Extensions

• KHR_punctual_lights
• KHR_texture_transform
• KHR_material_unlit

Known Limitations

• Only the albedo texture's transform from KHR_texture_transform will be used.
• Double sided materials are currently unsupported.