Add option to extract API docs from tarballs and upload them to the Xfce website

Submitted by Jannis Pohlmann

Assigned to Jannis Pohlmann

Link to original bug (#5851)

Description

This would be pretty cool. Next to each uploaded release, display a button to extract API docs from the release tarball and upload it to the Xfce website. It involves more than just the release manager webapp, but it would be nice.