「🔨」 fix: moved all function declaration into the cpp file

ex00/Makefile

@@ -6,7 +6,7 @@
 #    By: adjoly <adjoly@student.42angouleme.fr>     +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2024/10/25 16:09:27 by adjoly            #+#    #+#              #
-#    Updated: 2025/03/08 19:55:47 by adjoly           ###   ########.fr        #
+#    Updated: 2025/03/29 15:01:07 by adjoly           ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #