Improve README.md with testing tips and LICENSE link

Added guidance for using tools like Bruno, Postman, or VS HTTP
files to test API endpoints. Updated the license section to
include a Markdown link to the LICENSE file for easier access.

Author: vp

README.md

@@ -429,4 +429,4 @@ A few example requests are in [Core-API.http](./src/Modules/CoreModule/Core-API.
 --- 
 ## License
 
-This project is licensed under the MIT License - see the LICENSE file for details.
+This project is licensed under the MIT License - see the [LICENSE](./LICENSE) file for details.