Re-implement Management Feature in Godot

[d10sfan]

Current version of the godot UI does not support the management feature. This tracks adding that again.

The original version could only be accessed by a command line argument. New version should still allow for that, but maybe also add a button somewhere in the UI being shown to the user to trigger it (then a back button to go back to where it was if in that mode).

Main purpose of this is to see the games detected as run previously, and be able to clear lux config and cache.

As well, research the ability to have a button for each game to clear the game's config (like if it's in the ~/.local area).