Promotion prompt for user

[Espes99]

No description provided.

[SjoenH]

Probably don't want to spend time on this... but maybe:

Title: Implement Promotion Prompt for User

As a chess player,
I want to be prompted when my pawn reaches the opposite side of the board,
So that I can choose which piece (queen, rook, bishop, or knight) to promote my pawn to.

Acceptance Criteria:

1. When a pawn reaches the opposite side of the board, a prompt should appear.
2. The prompt should allow the user to select a piece (queen, rook, bishop, or knight) for promotion.
3. The selected piece should replace the pawn on the board.
4. The game should continue with the newly promoted piece in place of the pawn.
5. The user interface should be intuitive and user-friendly.