Shareable search URLs

Right now, searches aren't in the URL, so there's no way to share a link to a specific search. It would be nice if searching updated the URL with a query parameter (e.g. searching git → `https://resources.codesociety.xyz?q=git`), and loading that URL auto-ran the search. This would make it easier to share specific resources with members, just send a link instead of telling them what to search for.