com.unity.xr.interaction.toolkit 1.0.0-pre.5 Package Notes

Added public events to `UIInputModule` which correspond to calls to `EventSystem.Execute` and `EventSystem.ExecuteHierarchy` to allow the events to be globally handled.
Added profiler markers to `XRInteractionManager` to help with performance analysis.
Added ability for the Animation and Physics 2D built-in packages to be optional.

Changed `XRBaseInteractable.GetDistanceSqrToInteractor` to not consider disabled Colliders or Colliders on disabled GameObjects. This logic is used by `XRDirectInteractor` and `XRSocketInteractor` to find the closest interactable to select.

Fixed poor performance scaling of `XRInteractionManager` as the number of valid targets and hover targets of an Interactor increased. AR projects with hundreds of gesture interactables should see a large speedup.
Fixed AR Gesture Recognizers producing GC allocations each frame when there were no touches.
Fixed issue involving multiple Interactables that reference the same Collider in their Colliders list. Unregistering an Interactable will now only cause the Collider association to be removed from the `XRInteractionManager` if it's actually associated with that same Interactable.
Fixed the Inspector showing a warning about a missing XR Controller when the Interactor is able to find one on a parent GameObject.

com.unity.xr.interaction.toolkit 1.0.0-pre.5