Clean up code + make config file + black + modularization

[KevinBian107]

We need major refractors dealing with the modualrziation of team playing and individual playing, likely an agent class instantiated with different types of mode, training function, and inference functions

[KevinBian107]

We may want to use style of creating the single agent gaming env as a base class, then inherent the team playing mode from the single agent mode