Versioning the documentation

The documentation should reflect the current releases of Joomla!. For each minor version we will have a tagged version in the documentation and update the version dropdown in this documentation.

Command to run

When we release a new minor Joomla! version, the documentation will be frozen and the version will be tagged. Use

npm run docusaurus docs:version 4.3.0

to tag a version. The current state of the documentation will be copied to the versioned_docs folder and the versions.js is updated.

Update the Versions dropdown

In the docusaurus.config.js the key onlyIncludeVersions has to be updated to the latest stable version. Also the lastVersion has to be updated properly and the versions labels should be set.