First version for OpenXR (v2.02)

This means the old OpenVR with controller manifest files are not used. But that it should work for all headsets and controllers without specific files, even future headsets.

I have tested on Quest2 with Link/AirLink. I'm very interested in hearing reports from any other headset. I had problems with the pointer angle and had to offset it 75 degrees in X to get it correct, not sure if other devices have different offsets or if I'm doing it wrong.