Ensure that packages are installable

Update OpenProject image in openDesk

16.0 Release image for blog post and newsletter, incl. feature image

Release social media communication for 16.0

Identify new Enterprise add-ons for the release (if relevant)

Release PR communication for 16.0: heise and more

Confirm packager build is working across all distributions

Create release teaser for 16.0

16.0 Website + Docs translations to FR/ES/PT from Alconost

Present new features and changes of 16.0 to OP Team