[Feature] Add rule based 3D avatar control

[AmitMY]

Problem

Our 3D avatar control can currently only control Mixamo avatars, and does so very poorly.
Controlling more general avatars (especially with faces) is necessary.

Description

We should add a rule-based 3D avatar solver such as https://github.com/yeemachine/kalidokit to be solve the avatar positions from the mediapipe poses directly.

Alternatives

Neural-network only approach. This will require training a better avatar model.