NegaMax is a simplified version of the MiniMax algorithm that
doesn't need different subroutines for the different colors.
The testcases were selected and extended.
Evaluation now has values for draws and wins.
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.
