Rename some pointer events and components

[Jondolf]

Objective

#19366 implemented core button widgets, which included the Depressed state component.

Depressed was chosen instead of Pressed to avoid conflict with the Pointer<Pressed> event, but it is problematic and awkward in many ways:

• Using the word "depressed" for such a high-traffic type is not great due to the obvious connection to "depressed" as in depression.
• "Depressed" is not what I would search for if I was looking for a component like this, and I'm not aware of any other engine or UI framework using the term.
• Depressed is not a very natural pair to the Pointer<Pressed> event.
• It might be because I'm not a native English speaker, but I have very rarely heard someone say "a button is depressed". Seeing it, my mind initially goes from "depression??" to "oh, de-pressed, meaning released" and definitely not "is pressed", even though that is also a valid meaning for it.

A related problem is that the current Pointer<Pressed> and Pointer<Released> event names use a different verb tense than all of our other observer events such as Pointer<Click> or Pointer<DragStart>. By fixing this and renaming Pressed (and Released), we can then use Pressed instead of Depressed for the state component.

Additionally, the IsHovered and IsDirectlyHovered components added in #19366 use an inconsistent naming; the other similar components don't use an Is prefix. It also makes query filters like Has<IsHovered> and With<IsHovered> a bit more awkward.

This is partially related to Cart's picking concept proposal.

Solution

• Rename Pointer<Pressed> to Pointer<Press>
• Rename Pointer<Released> to Pointer<Release>
• Rename Depressed to Pressed
• Rename IsHovered to Hovered
• Rename IsDirectlyHovered to DirectlyHovered

[cart]

I would like to consider removing the generic Pointer<T> entirely in favor of PointerPress, PointerRelease, etc (freeing up Press and Release in the global namespace and flattening out the events, making them easier to consume). And there are a few other renames I'd like to do (as defined in my proposal). But I'm on board for these changes!