Copy README for repo from RHOAI courses

[rsriniva]

Copy README template from RHOAI courses - for example https://github.com/RedHatQuickCourses/rhods-intro

The README is shorter than the full contrib guide and easier to digest for new contribs

[flozanorht]

Maybe we should include it on the starter course? Like having the current README there, with a note in the end "remove this after you setup your repo and before you invite contributors" and having the README from RHOAI already there, at the end of the document?

For now I'm the only one working on the RHOSO courses. Let me find my whereabouts on the tolling and syntax, when I'm ready to ask for reviews I'll take care of that.