This produces more complete type information (unions, following type alias refererences that aren't successfully dereferenced at an earlier stage, etc.), in a format that is much easier to query from UI components. Also adds a snapshot test for easier future iteration.
I had a lot of trouble configuring Jest for the snapshot tests (something to do with imports and compile targets), and there are zero other tests in this directory right now, so I just tore out the test setup and replaced it with Vitest. Much faster!
The Vercel Data Cache caches data across deployments, and we want to
check for updates in federated content, so let's revalidate the data
once a day.
It may be more efficient to revalidate on-demand, since we don't change
most of these sources once a day, but that requires setting up an API
endpoint (and figuring out how to authenticate it), so this is
quick-and-easy for now.
Fetching recommendations on the server takes too long before the first
load, so it's faster to load the basic not-found page and generate the
recommendations on the client side.
