Document which GLTF extensions are (un)supported

[torsteingrindvik]

How can Bevy's documentation be improved?

Bevy uses GLTF as the main way to store scenes and 3D assets.

There are various ways in which GLTF assets can be optimized, one excellent tool is gltfpack. This tools lists which extensions it supports and some flags to pass in order to disable/enable some of them.

However, it is hard to predict what Bevy will support.

I propose that a natural place to list this is in the gltf module docs.

One way to list this could be in a tabular format, for example:

Extension	Supported	Requires feature
KHR_lights_punctual	✓
KHR_materials_anisotropy	✓	bevy_gltf_khr_materials_anisotropy
EXT_meshopt_compression	✗
...	✗

[torsteingrindvik]

Perhaps a column for "tracking issue" could be considered too.