Merge pull request #757 from vinitjain2005/feature/license-update

Added GPL v3 license to README and LICENSE file

Author: aayush105

README.md

@@ -1097,3 +1097,7 @@ For detailed guidelines on how to contribute, please refer to our [CONTRIBUTING]
 **[⬆ back to top](#quick-links)**
 
 Let's build something great together!
+
+## License
+
+This project is licensed under the **GNU General Public License v3.0 (GPL-3.0)** — see the [LICENSE](LICENSE) file for details.