Detailed "How to Contribute" Doc, Like Use Case's

[wesleyboar]

Overview

Promote Use Cases README.md to be a deep-dive "edit anything" doc.

Obstacles

The Use Cases README.md has the following sections —

3. Find Usecase
…
4. Edit Usecase
…
6. Add Images
…
12. Add Use Case New to User Guide

— and references like "your use case" and "your usecase.md file".