feat(cli): add initial repository management commands

- Introduce CLI using Typer for repository management
- Add commands for archiving, cleaning, moving, reviewing, and status
- Implement configuration loading and default structure setup
- Include utilities for Git status checks and directory size calculation
- Lay groundwork for extensible repository operations

Signed-off-by: Max P. <Mail@MPassarello.de>

src/repocat/__main__.py

@@ -0,0 +1,7 @@
+from repocat.cli import app
+
+def main():
+    app()
+
+if __name__ == "__main__":
+    main()