Search API: expose chunk matches over the streaming API
Created by: camdencheek
This exposes chunk matches on the streaming API the URL query param cm=t
.
It is currently unused, but I added a test to ensure chunk matches actually come through. Will experiment a bit to see how much work it will be to update the client side of things.
Note that Zoekt still doesn't send chunk matches, and I probably won't flip the switch here until it does.
Test plan
Added a unit test. Will be exercised more when the web client is updated to use it.