Rename Pointer events (and others?)

[davesmith00000]

Lots of good work has been done on input events recently, and in a small oversight, the naming convention has changed.

The work is to look for events like this:

sealed trait PointerEvent
object PointerEvent:
  final case class PointerClick(...) extends PointerEvent

...and rename it to:

sealed trait PointerEvent
object PointerEvent:
  final case class Click(...) extends PointerEvent

So that at the point of use, we go from:

case e: PointerEvent.PointerClick =>

...to:

case e: PointerEvent.Click =>