Implementing Controller Rebinding, Refactoring Controls System and Reworking Button Icons

[jasminegamedev]

This is still Work in Progress and is not ready to merge yet. This PR Implements Controller/Keyboard rebinding into the game. This includes new menus to handle the rebinding process, and reworking the backend systems as well to be able to support it. This also reworks how we determine button icons to be based on the key/button name.

Todo:

• [x] Test binding for all supported keys and buttons and make sure all icons work as expected. Possibly limit it so bindings can't work if they don't have icons.
• [x] Better handle some special cases like mac vs windows icons.
• [x] Clean up binding screen to show timer, and better names.
• [x] Additional cleanup and bug fixes.

Resolves #52

[jasminegamedev]

I believe this is now working, and is ready to merge.

There may still be a few binding issues, but some of these come from Foster, so we may want to look into fixing them separately. Mainly, a few keyboard keys don't seem to get registered as "Pressed" correctly, like the Windows button and the numlock button. I think this is probably acceptable for now, but we can revisit it if people complain.

There's also a known bug in Foster with Controllers where the select and home buttons seem to be flipped. I have a temporary workaround for this, but we may need to follow up on this if it gets fixed in Foster.