Its not the most clear to people looking at the guide
that there are other ways to contribute other than code.
There are sections on being an operator and a user, but there
are other types of non code contribution than those. This is
the first step in enumerating these other types of contribution.
This patch also adds a section on mentoring to the common directory.
In the future, it might be good to add it to the indices for other
sections of the guide- code& docs, operators, etc- in a follow up patch
but at this point the focus is populating the non-code contribution
activities list.
Story: 2001437
Task: 6148
Story: 2004131
Task: 27577
Change-Id: I7b64ea62572749c0fe097766d12d5655df79b7c0
32d98f5df5