Embed JQ as the preferred JSON parser in the product

## What?

As a product, Graylog needs to do a better job of handling nested JSON--implementing something like JQ in the product would be a great improvement over the current JSON parser.

## Why?

With more and more applications going the route of implementing structured logging and shipping logs in JSON, Graylog needs to be able to handle JSON in all its forms. The current JSON parser works fine if all the data in a JSON log is in a single level, but when we get to nested JSON, it falls short. Using something like JQ would supercharge the existing JSON parsing capabilities and provide a more readily accessible means of working with JSON.