Changes for the higher level, more Blender specific side of the implementation.
- WM-XR: Layer tying Ghost-XR to the Blender specific APIs/data
- wmSurface API: drawable, non-window container (manages Ghost-OpenGL and GPU context)
- DNA/RNA for initial management of VR session settings (could disable saving of these for now?)
- --debug-xr and --debug-xr-time commandline options
- Utility batch & config file for using the Oculus runtime (Windows only)