Add Rokid, XREAL Air 2 Ultra support, XDG Reorg, move to user systemd service
- Added Rokid support
- Added XREAL Air 2 Ultra, IMU-only support (no SBS)
- Breezy and the XR Driver have migrated off old xreal* naming and to using proper XDG directories, per wheaney/breezy-desktop#4
- The XR Driver has been migrated to a non-root systemd service (setup still requires root), see wheaney/breezy-desktop#8