[XR] changes to PointerSelection behavior

[RaananW]

• Default behavior - only one hand has the pointer selection ray.
• Configuration value - allow two hands to be the pointers

• Change between hands using the main button (first click on main button on hand with no pointer should move the pointer to this hand).
• Configuration value - force pointer selection to a specific hand.
• Configuration value - constant pointerMove events (defaults to yes)
• Configuration value - max picking ray distance and max pointer ray distance (the same value, currently defaults to 100 units)

[player11en]

Adding gaze interaction for webXR (without controllerInput). Mesh detection and timer offset bevor Selection.

Perhaps using camera rays by active xrcamera and and mesh hit by name or id. For timer visualisation i use bullet/ gui.ellipse() which appear circular around meshtarget ...
Sorry if its written bad can provide code if needed

[RaananW]

It's already implemented, but for teleportation only. I'll add a no-controller flag

[RaananW]

For documentation purposes - Gaze mode can now be enabled even when XR is not in gaze target ray mode - #8605