Automate publishing of the API documentation in the website

[mahozad]

For each new version of the library, publish its KDoc files (i.e. content of the javadoc.jar) to the website (Git branch on GitHub) automatically (using a CI in GitHub Actions).

NOTE

Dokka supports Versioning plugin as stated in its website which aims to "provide users with ability to create a versioned documentation. Therefore, users of the documentation can view different versions of the documentation by going to the main page and change versions."