Render error message in UI when uncaught exception happens

[mvandenburgh]

Adds a global error handler that renders a snackbar error message whenever an uncaught exception occurs.

Closes #768.

[waxlamp]

This is an elegant solution. Nice work!

The only other idea I have is to set the timeout to -1 (so that the snackbar doesn't auto-dismiss), and include a "close" button (like the example in the v-snackbar documentation). The rationale is to alert a user to an error when they're not paying attention (e.g., they flip to a different tab and come back 10 seconds later, or get up from their computer, etc.)

I don't want that to hold up this PR, though it should be an easy fix if you decide to include it.

[yarikoptic]

looks good to me, thank you @mvandenburgh !
Is there a dandiset on staging so I could go to https://deploy-preview-1320--gui-staging-dandiarchive-org.netlify.app/dandiset and enjoy it ? webshot demonstration seems to be on 000362 but I can't find it there

[mvandenburgh]

looks good to me, thank you @mvandenburgh ! Is there a dandiset on staging so I could go to deploy-preview-1320--gui-staging-dandiarchive-org.netlify.app/dandiset and enjoy it ? webshot demonstration seems to be on 000362 but I can't find it there

That was taken on my local development environment, where I intentionally introduced an error to trigger the alert. But, you can go to https://deploy-preview-1320--gui-staging-dandiarchive-org.netlify.app/dandiset/search?search=test&page=7&sortOption=0&sortDir=-1&showDrafts=true&showEmpty=false to see it in action (that links to some search results with an invalid page number, which currently results in an exception and is another bug on my list to fix)

[dandibot]

🚀 PR was released in v0.3.0 🚀