[SeasonOfDocs] Introducing new training into QGIS docs

[matteo]

Hi Ori,

> That's great to know, I am assuming there is a documentation of how to upload our case study to this page?

not yet. Until now all the people interested in publishing a case study
just have to write an email to one of the qgis mailing lists.

Case studies are in another repository than the documentation one we
have to discuss how to merge all these resources.

Cheers

Matteo