GitHub License Observer per galdor

While GitHub has historically been a place to host Open Source software, more and more projects have started to use non Open Source licenses such as the Business Source License and the Server Side Public License. Since these licenses are not identified by GitHub, it is way too easy to start using a project before realizing that it does not contain Open Source code, thus causing potential legal issues.

This add-on tries to identify the license of each project and display a clear label indicating whether the license is Open Source or not.