Create workflow to publish releases.

[crud89]

We should provide a separate script that runs with every commit to the main branch, that builds the documentation and deploys it to a litefx-docs repository. Furthermore, we should forbid commits to the main branch, so that each change needs a branch.

This nicely fits with issue #30.

[crud89]

The more optimal solution is to create a workflow to automatically publish a release. The workflow should accept the version parameters on invocation (described here). It then should update the Version.cmake file accordingly and try to create a build for both configurations: Debug and Release. If the build succeeds, it should invoke doxygen to create the documentation. If this also succeeds, it should push the updated Version.cmake file, as well as the generated documentation (see here) to the repository. From the new commit it then should create a new tag and attach the release to it. Another parameter for the workflow would be the changelog.