Guides: improve navigation

[pdurbin]

Note: you can preview this pull request at https://dataverse-guide--10942.org.readthedocs.build/en/10942/

You can compare it with https://guides.dataverse.org/en/latest/

What this PR does / why we need it:

The Documentation Working Group observed that there's no "home" button for the guides. I started by fixing this but kept going:

• At the top "Dataverse Project" has been changed to "Dataverse Guides" and it now serves as a home button for the guides. (Previously, clicking would bring you to dataverse.org.)
• "v6.6" (for example) in the navbar links to the "versions" page
• Replace various links in navbar with a single "About Dataverse" link to dataverse.org
• "Next" and "Previous" links appear at the bottom of every page
• A "Source" link appears at the bottom of the page

Before

After

Which issue(s) this PR closes:

• Closes No home button to navigate to home page of guides #10941
• Re-closes Previous/Next navigation links in dev guide #2163

Special notes for your reviewer:

I'm removing the custom navbar.

Suggestions on how to test this:

Try https://dataverse-guide--10942.org.readthedocs.build/en/10942/

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Yes. See before and after screenshots above.

Is there a release notes update needed for this change?:

Yes, added.

Additional documentation:

None.

[pdurbin]

Based on feedback from @DieuwertjeBloemen at https://dataverse.zulipchat.com/#narrow/channel/446770-docs/topic/no.20home.20button/near/477816742 I added "About Dataverse" to the navbar in 5c5812e. It links to dataverse.org

Here's an updated screenshot:

[pdurbin]

@ofahimIQSS @DieuwertjeBloemen @CharityEverett, and I touched on this during the documentation working group meeting this morning.

As I mentioned above, I might want to remove source/_static/navbar_from_dataverse_org.js which might be cruft.

For now Omer and I agreed to keep this going and put it on the board. I also merged the latest from develop in.

Please keep the feedback coming!

[coveralls]

coverage: 22.735%. remained the same
when pulling e46762a on 10941-remove-custom-guides-navbar
into 5fbfea2 on develop.

[ofahimIQSS]

Anything we can do about user experience on smaller screens? I see the side nav bar intersecting with the footer when I expand content (ie. clicking on Admin Guide then reducing browser size):

edit: actually, this may be a bug as I can reproduce in large screen as well.

[pdurbin]

@ofahimIQSS I'm pretty sure that overlap we're seeing only occurs on the ReadTheDocs preview service we use.

Check it out, the overlap also happens at https://dataverse-guide--11374.org.readthedocs.build/en/11374/admin/index.html which is a completely unrelated PR (#11374).

You could build the PR locally if you want, or with Jenkins, to avoid using the ReadTheDocs service when you're testing.

[ofahimIQSS]

Thank you for the clarification - I see no issues here. We can go ahead and merge this.