Input cycling and overlay system

This PR has two things

####Input Cycling:

• You can setup hotkeys to cycle inputs for players 1-4
• 
• Useful for when you want need to switch between devices quickly.

####Overlays:

• When making input cycling, I wanted some visual feedback.
• But toasts don't render on top of games.
• I used SkiaSharp to render overlays onto the render pipeline.
• 
• For example this appears when you load a game and when you cycle through inputs.
• Duration can be configured from UI settings.
• 

I only tested these on MacOS (my current dev machine).
Later I will test on Windows and Bazzite.

Issues

• The initial overlay timeout starts during the game loading so it times-out too quickly or doesn't show at all.

TESTED ON BAZZITE

Using Kirby Star Allies

• The overlay is upside down
• It drops to single digit frames while the overlay is being displayed