Draft: Citation CrossRef error checking

CrossRef's Metadata Search was down today (you can look at the status here: https://status.crossref.org ). Requests for citations were timing out; this wasn't being handled correctly and was giving an error. This deals with the situation correctly – we could also add a timeout on the Axios call, but using 5000 was too fast when the API came back up. Maybe 10000? Not sure.

Edit: is a bad MR! I'm going to remake this off of main, this includes a bunch of unrelated code because I wasn't coming off of main.