Helpsite to signpost to Intro to GrantNav workshops

[mariongalley]

We'd like to signpost to the Introduction to GrantNav workshops on the Helpsite, ideally in a way that can be seen across all pages.

Ideally we'd have some kind of banner at the top using an existing component like these banners in the Publisher Guidance

It should say something like:

Want to learn more about how to use GrantNav? Sign up to our Introduction to GrantNav workshops to get the most our of GrantNav's search and use it to answer your biggest grantmaking questions.

Also I think we should change this content at the bottom of the nav.

"Useful links" should have

• Workshops
• Publish
• Quality Dashboard

And can we remove the Version stuff altogther?

[mrshll1001]

I've addressed this and built it, take a looksie here:

• https://help.grantnav.threesixtygiving.org/en/mm-signpost-intro-to-grantnav-workshops/refining_results/#

I'll open up a PR, which I can edit later if you need to change the copy etc.

[mrshll1001]

Also, just noting that I don't think I can turn off the versioning menu via the sphinx config. I will try to do this via readthedocs' interface.

[mariongalley]

@mrshll1001 Happy with the useful links change. Any luck with the bigger banner I suggested?