docs(list): moving the actual documentation on the header

- The documentation on the header allow u to see on the files where the
header is inclued

list/ft_lstadd_back.c

@@ -6,19 +6,13 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:39:56 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/01 16:35:17 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:14:04 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "list.h"
 #include <unistd.h>
 
-/**
- * @brief Add the list new to the back of chained list of lst
- *
- * @param lst first element of the list
- * @param new The element to add at the end
- */
 void	ft_lstadd_back(t_list **lst, t_list *new)
 {
 	t_list	*tempo;