Implement combining of multiple tracker types into one for enhanced tracking

[EnderShadow]

For example, pairing each slime tracker with a vive/tundra tracker so that drift can be automatically corrected when base stations are in view.

The main benefit of this from the slime side is that drift can be eliminated or greatly reduced by taking advantage of base station based trackers.

The main benefit of this from the base station tracker point of view is that occlusion becomes a non-issue since the slime trackers can handle tracking when the base station is occluded.