style(includes): moving the includes in libft folder

- Disable conflict with libs like math.h

includes/libft/gnl.h

@@ -0,0 +1,35 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   gnl.h                                              :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2023/11/18 17:12:04 by rparodi           #+#    #+#             */
+/*   Updated: 2025/12/11 15:24:17 by rparodi          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef GNL_H
+# define GNL_H
+
+# ifndef BUFFER_SIZE
+#  define BUFFER_SIZE 420
+# endif
+
+# include <stdlib.h>
+# include <unistd.h>
+
+char	**memory_storage(void);
+char	*ft_get_line(char *str);
+char	*get_next_line(int fd);
+void	get_next_line_clear(void);
+char	*ft_get_next(char *str);
+char	*ft_get_line(char *str);
+char	*ft_strjoin_gnl(char *s1, char *s2, int i, int j);
+int		ft_strchr_index(char *str, char c);
+char	*file_converted(int fd);
+char	*ft_free(char *str);
+char	*ft_check(char *memory, int fd);
+
+#endif