skeleton_profile
Files live in animations/. Used by no component property yet.
A skeleton profile is the canonical skeleton a bone map's names come from,
and the rest pose a clip written against it was keyed relative to. Each bone
has a name and, optionally, a rest_rotation in euler radians and a
rest_position whose length scales a retargeted position track. A document
with no bones is the built-in humanoid.
type = "skeleton_profile"
[[bones]]
name = "Hips"
rest_position = [0.0, 1.0, 0.0]
[[bones]]
name = "Spine"
rest_rotation = [0.0, 0.0, 0.0]