Test: Add helpful docstring to main CLI entry point

[Hell1213]

Issue Description

The main CLI entry point () should have a helpful docstring that explains what the CLI does and how to use it.

Current Behavior

The function in may not have a clear docstring explaining the CLI's purpose.

Expected Behavior

Add a clear, helpful docstring to the main CLI function that:

1. Explains what the CLI does
2. Shows basic usage examples
3. Lists available commands

Files to Modify

• main.py - Add docstring to main function or CLI group

Acceptance Criteria

• Docstring added to main CLI function
• Docstring explains CLI purpose
• Docstring includes usage examples
• Docstring lists available commands

Testing

1. Run python3 main.py --help
2. Verify help text is clear and helpful
3. Check that docstring is visible in code

Priority

Low - Documentation improvement