No support for large textures

[ShaddyDC]

I was thinking about using this viewer for very large files, but large textures are currently broken. There exists an upstream issue with the gltf crate: https://github.com/gltf-rs/gltf/issues/388

I have opened the issue here both so you are aware of the issue and have context, and to have a place to follow up if the API has to be adapted.

[adrien-ben]

Thank you for opening the issue, I'll keep an eye on it.