Run storybook tests in ci

[wlach]

Storybook snapshot tests in CI (where we verify that stories still render after a pull request) can often catch problems, e.g. it was helpful in the iodide project (see iodide-project/iodide#2506). I'm not sure how to set this up in Svelte but I'm guessing it should be possible. You can see the aforementioned PR for iodide for some ideas.

[wlach]

@edward-hong care to give this a try?

[edward-hong]

Yea sure I'll take a crack at this

[DawoodShahat]

@wlach Can I work on this issue?

[wlach]

@wlach Can I work on this issue?

I think so, it's been nearly a month so am guessing Edward has moved on. This would be hugely valuable BTW (it would give us enough confidence to auto-merge dependabot PRs, which is currently a manual process)

[DawoodShahat]

Yeah thanks, will start working on it right away.