Show animation when extension is doing work

[mdavis-xyz]

Is your feature request related to a problem? Please describe.

I'm working with a very large notebook, and a very slow network connection. It takes about 30 seconds for the extension to finish doing it's thing. During that time, it's not clear whether it has already finished, or if it's still working, or if it failed somehow.

Describe the solution you'd like

When you click the icon, it starts rotating. Once the formatting has finished, it stops rotating.

Describe alternatives you've considered

• A popup/dialogue is probably too annoying.
• Changing icon colour might work, but you'd want to be sure it works with all themes

Additional context

• Python package version: 3.0.2

• Extension version: 3.0.2

• Operating System and its version: Ubuntu 24

[krassowski]

This sounds like a good idea, I would be happy to review a PR if someone is interested in implementing this!