* Added Score structure
* Added Liberation Mono Bold font in src/assets/
* Racket structure has Score member
* General cleanup and improvements
* BUG: font_path string is dependent on where the binary is run
* Movement of ball and rackets are correct
* Score is recorded and displayed on terminal, not on the window
* Ball is represented as a square and not a disc
* Window is fixed and not scalable
* Player controls are E-D (up-down) for Left, I-K (up-down) for Right
* Ball reset parameters are fixed (except for direction)