changed check of output folder to allow other files and folders

    # parse configuration

    cfg = config.TestConfig(args.config)

    # check if output folder is empty

    if cfg.output_path.is_dir():

        file_list = [

            f.resolve().absolute()

            for f in cfg.output_path.iterdir() if not f.name.startswith(".")

        ]

        if len(file_list) != 0:

            raise ValueError("Output folder is not empty. Please delete or move files and folders.")

    # set up processing chains

    chains.init_processing_chains(cfg)

"""

def create_dir(p: str) -> None:

def create_dir(p: str, exist_ok=True) -> None:

    p = Path(p)

    p.mkdir(exist_ok=True, parents=True)

    p.mkdir(exist_ok=exist_ok, parents=True)

def delete_dir(p: str) -> None:

        )

    def __enter__(self):

        try:

            for path in self.create_paths:

            create_dir(path)

                create_dir(path, exist_ok=False)

        except FileExistsError:

            raise ValueError("At least one of the output folders already exists. Please delete or move this folder.")

    def __exit__(self, exc_type, exc_value, exc_traceback):

        for path in self.delete_paths: