* Changes
  - Add support for Unity 6
    - Fix compile errors & warnnings
  - Add support for VIVE OpenXR Unity SDK
    - Now support hand tracking thru Unity XR Hand
      - Goto PackageManager > install "XR Hands" (com.unity.xr.hands)
      - Goto ProjectSettings > XR Plug-in Management > OpenXR > Enabled Interaction Profiles > add "VIVE XR Hand Interaction"
      - Goto ProjectSettings > XR Plug-in Management > OpenXR > OpenXR Feature Groups > enable "Hand Tracking Subsystem"
      - Tracked hand will identify as VRModuleDeviceModel.UnityXRHandRight/Left
  - Add support for latest Wave XR plugin
    - Fix selecting wrong left/right device in some cases
  - Add support for latest Oculus plugin
    - Fix tracked hand model not working