Completely rewrote Game/Racers module

Highlights:
* OOP (helps a LOT of stuff)
* Now uses JSON based settings file, removing many issues with older
format
* Automatically converts existing CFG settings to JSON (when possible)
* Confirms settings _before_ writing them, a big issue previously
* Split user input from settings manipulation functions
* No longer imports PatchIt module to return to main menu :smiley:
* Is a singleton, makes it faster to access the values
* Overall MUCH better