Accessibility: Add polite notifications to loading spinner
Created by: umpox
Closes https://github.com/sourcegraph/sourcegraph/issues/35318
Adds aria-live=polite to LoadingSpinner.
This will only be spoken if the page/screen reader is idle but it useful as a tool to help inform users that an active query is currently loading.
Test plan
Tested locally with a screen reader
App preview:
Check out the client app preview documentation to learn more.