Bug report: Not all bone tracks exported in VRMa (non-humanoid bones may have keyframes too)

[tdw46]

Describe the bug

Non-Humanoid bones don't have keyframes exported in VRMa output.

To Reproduce

1. Import VRM: Test_Anim_Rig_vrm.zip
2. Import animation: Idle_glb-Animation.zip
3. Apply animation to VRM rig
4. Export as VRMa, output will not have non-humanoid bone tracks. Will match: Idle_VRM-Animation.zip

Expected behavior

I expect rigs that have a lot of extra non-humanoid bones with keyframes to have those stored in the gltf animation track data.

Screenshots

Desktop (please complete the following information)

• OS: Windows 11
• Blender 4.2.1 LTS
• Addon Version: Latest, 2.20.88

Additional context

We should embed the gltf addon preferences under "Advanced" in the VRM export preferences to mitigate these kinds of issues for power users.