Reorganize the content presentation and prepare for oCIS

[mmattel]

WHAT Needs to be Documented?

The existing content (releases, release notes, server and clients notes are mixed, focus on server even not highlighted ect) is not optimal located as things are mixed up and not easy to find based on the general product range or how a potential reader may look on.

WHY Should This Change Be Made?

Have a better overview and access to our content Prepare for oCIS