feat(cli): allow to pass command line arguments to function

src/jcloud_docsgen/cli/cli.py

@@ -35,7 +35,7 @@ def existing_directory(path: str) -> pathlib.Path:
         raise argparse.ArgumentTypeError(f'{_path}: not a directory')
     return path
 
-def main() -> int:
+def main(argv = None) -> int:
     common_parser = argparse.ArgumentParser(add_help = False)
     common_parser.add_argument(
         'project_directory',
@@ -88,7 +88,7 @@ def main() -> int:
         help = 'indicates whether Markdown tables are allowed in the documentation. By default, Markdown tables are disabled. Warning: Markdown tables are not CommonMark.'
     )
 
-    args = argument_parser.parse_args()
+    args = argument_parser.parse_args(argv)
 
     if args.output_dir is None:
         args.output_dir = args.project_directory / 'docs/reference'