Support for desktop mode / XRI 3 Simulator

[eusebiu]

Is your feature request related to a problem? Please describe.
Support for desktop mode: WASD + mouse (for rotation/orientation).
Support for XRI 3.x.

Describe the solution you'd like
Use XRI 3 Simulator when the app is simply loaded in the browser. Once entered in VR, the Simulator is ignored.

Describe alternatives you've considered
I tried using Tracked Pose Driver (Input system) instead of the Tracked Pose Driver (legacy) but VR is broken.

[eusebiu]

I've managed to make it work using the XRI 3 Rig and adding the Tracked Pose Driver (legacy), WebXRCamera setting to MainCamera but disabling Tracked Pose Driver (Input system). Also, simulator does not work in WebXR - the full body rotation is not working (I guess it needs Tracked Pose Driver (Input system)).