Support for GLB file

[ZikZakFR]

Pitch

GLB file is a fomat for packed 3D models, already supported by the most famous social network out there and https://hubs.mozilla.com/
More info: https://en.wikipedia.org/wiki/GlTF

Motivation

It is now fully supported out-of-the-box by Blender and possible to display in a browser (via javascript libraries) and even right-away with Pain3D, when Mastodon will be able to render this type of file we may see a new artistical content.