adding support for changing window position

[PalsFreniers]

I added a helper function to move a window to a specific point on the screen :

void mlx_set_window_position(void *mlx, void *win, int x, int y);

I added a function named setWindowPosition to the Application class and used SDL_SetWindowPosition to implement the displacement of the window

[github-actions]

Hello! Thank you for your contribution.

If you are fixing a bug, please reference the issue number in the description.

If you are implementing a feature request, please explain all your changes in your pull request.

[Kbz-8]

in which case would you want to move the window ?

[PalsFreniers]

I have multiple window and I want to move them a startup so they don't begin one on top of the other

[Kbz-8]

seems legit