Implement the geospatial XRCoordinateSystem

[TrevorFSmith]

The XRCoordinateSystem is implemented for stage, eyeLevel, and headModel but type geospatial is stubbed out.

Implement the WSG84 geodetic frame calculations to position a given latitude / longitude / altitude so that the origin and orientation are positioned on the plane tangent to the geodetic frame with X, Y Z corresponding to East, Up, South.

Implement the transformation calculation between geospatial coordinate systems and the other types.