Missing LICENSE file (README references MIT but no file exists)

## Issue

The README has both a badge and footer referencing an MIT license:

- Badge: `[](LICENSE)`
- Footer: "MIT License - See [LICENSE](LICENSE) file"

However, no `LICENSE` file exists in the repository. Without an explicit license file, the code is technically "all rights reserved" under copyright law, despite the MIT badge suggesting otherwise.

### Impact

- Contributors and users have no clear legal standing to use or modify the code
- The badge link returns a 404

### Suggested Fix

Add a standard MIT LICENSE file to the repository root, or update the README to reflect the intended license.