Show version for Sphinx and this template in footer.

[marxin]

Let's continue here where we ended in #1269.

@benjaoming edit:
Fixes #1327

[benjaoming]

Great, thanks for following up @marxin 👍

Before making adjustments in the PR, I want to hear from @agjohnson if he's fine with adjusting the text of the footer as well.

Built with Sphinx 6.1.3 using sphinx-rtd-theme 1.2.0rc2 by Read the Docs.

Looks like:

Motivation: The version string looks odd next to "a theme", I think it's because it's very specific to mention the theme version but not its name. This is also shorter.

It should be clear from the name "sphinx-rtd-theme" that it's a theme :)

[benjaoming]

@marxin do you mind if I make some modifications in this PR?

While going over #1327, I realized that we are modifying exactly the same text and perhaps we should fix that issue in the same go. It's about merging the 3 separate strings into one big string for translation.

[marxin]

@marxin do you mind if I make some modifications in this PR?

Go ahead! I'm fine with that.

[marxin]

@benjaoming: May I please remind you this PR?

[benjaoming]

Looking good! Now as a single translation string:

[marxin]

Can you please merge it now?

[benjaoming]

I'm good with this. @agjohnson for context, this adds version strings that are really really helpful to be able to diagnose issues with Sphinx/theme faster.

[Geeyun-JY3]

Why this PR is closed?

[marxin]

I'm sorry, but the pull request is quite stalled and I've lost interest in the meantime.
Feel free to re-open it in a separate PR.

[Geeyun-JY3]

Fine :(