Morping and skining doest not work with raytracing

[mwestphal]

Describe the bug
Morping and skining doest not work with raytracing

To Reproduce
Steps to reproduce the behavior:

1. Open the file using `f3d --dry-run SimpleMorph.gltf
2. press space to play animation
3. press R to enable raytracing
4. no animation, morphing and skinning is ignored

Expected behavior
Morphing and skinning should work with raytracing

[Meakk]

Known issue. It will never work (the skinning/morphing are GPU accelerated in the shader directly), I think we can close it.

[mwestphal]

Well, I think it is worth it to implement it CPU side, people using F3D to render frames with raytracing would be happy to have skinning and morphing supported. It there a reason why it cannot be done apart the effort needed ?