Add Notes for TSV Format

[jag3773]

TSV Overview

We have switched our tN help resource to a TSV file format. This is mostly supported with the current RC spec but I think we need to make some minor changes to fully allow it.

The files and the format description are in https://git.door43.org/unfoldingWord/en_tn#structure .

Doc Updates Needed

This is a list of places that need updated (please add to it as you see fit):

• Support help types in the condensed form
• Specify that TSV files are allowed, effectively pivoting the information normally contained in Markdown to the headers of the TSV files