[Progress] adding wishlist generic controller

src/Controller/WhishlistController.php

src/Form/WishlistType.php

templates/whishlist/_delete_form.html.twig

templates/whishlist/_form.html.twig

templates/whishlist/edit.html.twig

templates/whishlist/index.html.twig

templates/whishlist/new.html.twig

templates/whishlist/show.html.twig