[Engine] [Display] PlayerWindow: display menu window

[Niwils]

The player window is able to show the player camera and the overlay and menu windows.

The PlayerWindow object transmits the click position on the overlay or menu window.

Hence:

• A set of classes handling the definition of the window/overlay content and its events shall be coded.
• A mechanism allowing to update the model from the overlay output actions.

[Niwils]

22/06/2024: Basics for popup window and main game bar have been demonstrated. Code shall be now cleaned-up and a container might be needed to transfer the menu sprites.