New reference panel: sort search-based results by proximity
Created by: mrnugget
This ports the jaccard-index-based sorting from code-intel-extensions to the new reference panel and adjusts the types for it to work properly.
I also need to double-check whether the old code isn't broken in code-intel-extensions, because it uses the url.hash to get to the "file path" and our current URL schema doesn't have that in the hash. But maybe the extension-api uses different schemes. Will check.
Test plan
- Tested manually a lot, with lots of debug printing and manual checking of results before/after sort.