Zoekt: Add search button to code view

Problem to solve

Currently, you can click Find references if you have Sourcegraph integration enabled.

Proposal

I'd like to propose adding a search button (maybe a magnifier icon) if the project is searchable in Zoekt. Clicking it should perform an exact match search with the selected text used as search term.

Something similar to:

I think we can make it look better

brings us to