fix: add save_stdout handling in exec_builtin and unlink_files call in handle_exit

fix: add unlink_files calls to ensure proper cleanup in main execution flow

fix: update free_instruction to handle unlinking files and adjust waitpid usage

fix: ensure file descriptor is valid before usage in heredoc execution

refactor: rename output and truncate variables for consistency

feat: add error handling when non digit char are passed to exit

fix: leaks on env when exit builtin is called

merge

fix: leaks with cd builtins

fix: supprimer les paramètres de formatage de l'éditeur

fix: norminette

fix: double free token

fix: export leak

fix: leaks with token allocation

fix: secured free tab