Update conf.py to display the announcement banner

[jni]

References and relevant issues

Together with #341, this PR supersedes #332.

Description

The announcement banner text html was added in #341. This PR now points our
config to it, allowing the banner to be displayed.

Note: #332 also has a CSS fix. However, that fix is included in the latest
release of the napari-sphinx-theme, so I think it's best to leave it out of
this PR. (I would be happy to make a separate PR for it if we don't want to
wait until the dependencies are updated.)

[jni]

Boom. 😃

[jni]

Hmm, anyone else seeing this? On Firefox, the link target for the survey link is just a few pixels tall:

Screen.Recording.2024-01-31.at.10.46.34.pm.mov

Fine on Safari and Chrome.

I don't think it has anything to do with this PR and everything to do with the theme, so I don't think we should hold this up to investigate. (I still managed to click it 😂 and I think Firefox users are a persistent bunch! 😂)

[Czaki]

On my machine, it looks bad:

Both Chrome and Firefox

[jni]

@Czaki that is this note:

Note: #332 also has a CSS fix. However, that fix is included in the latest
release of the napari-sphinx-theme, so I think it's best to leave it out of
this PR. (I would be happy to make a separate PR for it if we don't want to
wait until the dependencies are updated.)

I will make the separate PR, but the permanent fix is napari/napari-sphinx-theme#145, which is in v0.3.2 (released, but not updated in pins).

[jni]

@Czaki see #344. It should be safe to merge before this one, and then main can be merged here.

[Czaki]

There are #6562 and #6632 that will shortly be ready to merge so #344 will be obsolete?

[jni]

Yes, just wanted to make sure you had multiple options at hand before I went to bed. 😊 Feel free to close #344 if it gets fixed! But this one should get merged/backported either way. 😅

[melissawm]

Confirming, looks ok on my firefox/linux:

firefox.mp4