chore(license): Relicense project from Apache 2.0 to GPLv3

Author: cp099

.DS_Store

@@ -6,7 +6,4 @@ This product includes software developed by:
    - Sumukh Prasad (sumukhprasad) (Original Sherlock v1.0 - Concept and Ruby on Rails Implementation)
 
 This product is based on the original Sherlock project, which can be found at:
-https://github.com/Atal-Lab-DPSBS/Sherlock
-
-This product includes software developed at
-the Apache Software Foundation (http://www.apache.org/).
+https://github.com/Atal-Lab-DPSBS/Sherlock

.github/.DS_Store

@@ -2,7 +2,7 @@
 
 ![Python Version](https://img.shields.io/badge/python-3.11+-blue.svg)
 ![Django Version](https://img.shields.io/badge/django-5.x-green.svg)
-![License](https://img.shields.io/badge/License-Apache_2.0-yellow.svg)
+![License](https://img.shields.io/badge/License-GPLv3-blue.svg)
 
 **Sherlock is a comprehensive, self-hosted inventory and lending management system designed for school labs, makerspaces, and workshops.** It provides a powerful, data-driven platform to track assets, manage student loans, and gain insight into your lab's operations, all accessible from any device on your network.
 
@@ -191,4 +191,4 @@ For a more detailed development setup, including how to create a superuser for t
 
 ## ⚖️ License
 
-This project is licensed under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text and the [NOTICE](NOTICE) file for attribution details.
+This project is licensed under the GNU General Public License v3.0. See the [LICENSE](LICENSE) file for the full license text and the [NOTICE](NOTICE) file for attribution details