Skeleton Separation Refactor

[Erimelowo]

This is a relatively big refactor of how we interact with the skeleton. The goal is to make it more like a black box.
The outside should not have direct access to the inside, thus we are now using a HumanPoseManager to get and set everything related to the skeleton (including config)

WIP, as BVH and Autobone still need to be migrated to this new system.

[Erimelowo]

This changes the path to the processor package, so CODEOWNER will need to be adjusted consequently.

[Erimelowo]

Also, Autobone needs testing to make sure it still works the same as it’s supposed to.

[Eirenliel]

tldr ;_;

[Erimelowo]

sowwy 3:

[ButterscotchV]

I can review some of it, but I've contributed some to it so I'm not gonna be able to review all of it properly. I'll try to do a review and state what files I contributed and am unable to review.

[Eirenliel]

Please do your best @ButterscotchV. I'll try to look through it until the end of the week.

[Eirenliel]

LGTM but needs third pair of eyes