Mitch/kv search

[mitchelljkotler]

• URLs work
• Needed some custom SQL. I think this is fairly optimized, but too slow for use on full documents, so I restricted to requiring a project to filter by. This might be improved upon by adding an index to the JSON field, I might try that locally
• Also, I feel like this should probably be paginated in case of large projects with many keys? Since it uses custom SQL it would need a custom paginator, and since everything else uses cursor based pagination now, it gets slightly complicated. But it should be possible if that is what we want

[allanlasser]

How does this compare with #309?

[duckduckgrayduck]

Is it on staging? We can try to compare the two on there. I was going to take the custom SQL query approach, was worried about taking in user input to do the query.