KHR_animation_pointer

[julienduroure]

• Need to merge main (conflict with NavNode)
• Check Occlusion reverse
• Now we merge curve evaluation, remove caching and using evaluation => Not sure this is possible, using scene mode, bake needed
• Check if glTF validator is up to date with the extension
• cone inner / outer => problem import
• emissive Strength => problem export when default value is < 1.0 ?
• camera xmag => check that only ymag is needed at export
• camera xfov => check that only yfov is needed at export
• Volume attenuation distance => pb export
• Fix anim switcher
• Someone reported a crash when exporting TRS with animation pointer
• Texture offset for unlit, cf Unlit : Animations get discarded since a socket is not found KHR_animation_pointer #2208