Building core logic structure of the project

[MichaelMrt]

ToDo's left

• [ ] Boardcolor, background brown and white
• [ ] multiple moves with inputs
• [ ] check rules like white beginning
• [ ] _check_move_legalmethod for pawns
• [ ] add turn count

[MichaelMrt]

I added 2 inputs to enter x position of a piece and y position of a piece that you want to move, then 2 more inputs to tell the piece where to go.

A single move works and after submitting the page will be updated

The other ToDo's will be done in other pr's