Add audio feedback for text selection

[nekodex]

selection-sfx.mov

• depends on Samples for text selection osu-resources#208
• depends on Add callbacks to text selection events of TextBox osu-framework#5366
• depends on Introduce FramedBeatmapClock (and use in gameplay flow) #19828 (framework bump fixes)

[Susko3]

Is it intended that both the caretMoved and deselect samples play when the selection is dismissed by keyboard arrow keys.

Eg. select some word in a middle of a sentence and then press left or right arrow key.

[Susko3]

Possible division by 0 here, resulting in NaN pitch. Shockingly, this doesn't crash, but instead plays the sound high-pitched. It's probably not intended for selection to change and Text.Length to be 0 (framework-side bug) but I think this should be guarded against.

Also, pitch is double, but this is casting to float.

[nekodex]

How were you able to trigger a selection change with Text.Length being zero? It's probably better to ensure OnTextSelectionChanged is never called when Text.Length is zero than guarding here?

[peppy]

Test failures here will be fixed via #19828, marking as prereq for now.