[Bone Morph] Add an Armature option

[Sharkacuga]

My feature is to add Armature blendshapes so if you don't have a persifc blendshape like eyes you can add them in and adjust where the eyes need to be for the look up and down etc

[0b5vr]

Sounds like eye movement still can be done using bone type lookAt in this situation.

https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0-beta/lookAt.md#lookattype