Add license information to README file (#4)

* Initial plan

* Add License section to README with MIT License reference

Co-authored-by: huan <1361891+huan@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: huan <1361891+huan@users.noreply.github.com>

Author: Copilot

README.md

@@ -39,3 +39,7 @@ That's it.
 ## Author
 
 Huan, Dec 8, 2025
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.