Integrated the engine into the playable game.
Created a menu to choose between single player and hotseat.
Added a way to choose difficulty and color in single player.
Setters are not needed as all the assigning gets handled inside the file.
All Setters were removed.
The try-statements were used to excessively and were changed for manual checking
The most important movements and even en passant and castling are implemented.
A cli game is not done for now.
An engine is the goal of the project, but will be focussed at the end of the basic development.