Add json version data to docs

[APN-Pucky]

Depends on:

• [x] https://github.com/easybuilders/easybuild-framework/pull/4152

This PR adds a json formatted list from easybuild to the docs. This then should pave the way for EasyBuild being included on Repology https://github.com/repology/repology-updater/issues/705.