For search highlights, provide a documentcloud link to the highlight

[duckduckgrayduck]

Search highlights have a viewable and referable link on the frontend, like these for the word Mueller on the first page of this document:|https://www.documentcloud.org/documents/23939619-mueller/?q=mueller&mode=document#document/p1

The API doesn't return a link to this asset though. It would be nice if it did.
https://api.www.documentcloud.org/api/documents/23939619/search/?q=mueller&hl=true

[allanlasser]

We agree this is a client-side change, not something the API needs to bake in. We'll transfer this to the Python client repo for further work.