Add language rfc getting started guide for first time language rfc contributors #119
Description
We failed to provide guidance from the first time contributor perspective for assumptions,
conventions, considerations and constraints/limitations that would be a huge benefit to the
successful submission of a language RFC with minimal review round trips.
This is a process failure ( our fault ) and was brought to our attention in this issue:
Note from/to maintainers: This is a tracking issue to ensure the guidance ( now WIP ) is not forgotten now that the need has been captured.