Connect hook_help to README.md

The MR is ready for review.

Here's the current README:
**This is not a functional module yet.** It is under active development under [Contrib First](https://guidebook.civicactions.com/en/latest/common-practices-tools/contribution/contrib-first/).

And here's the help page:
<p><strong>This is not a functional module yet.</strong> It is under active development under <a href="https://guidebook.civicactions.com/en/latest/common-practices-tools/contribution/contrib-first/">Contrib First</a>.</p>

Nicely done @skyriter. I like this new pattern.

Automatically closed - issue fixed for 2 weeks with no activity.