Add examples of Rules embedded in YAML documents

[obfischer]

Task Description

The reference of jQA should contain some examples of jQA rules embedded in YAML documents.

Definition of Done for the Implementers

• We got a final feedback from the reporting user
• Documentation has been written
• Added a note on the new feature to the release notes

[obfischer]

This is a task that has not been done for release 1.9.0.