This ticket involves adding the ai entry point and text input for the aggregations page. This feature is behind a feature flag. Let's share and generalize the components used with the query bar ai input where possible.

Note that we want to be sure that the pipeline is not run. If it contains things that could change the user's data, like $out or $merge, we should inform the user or make it explicit to make sure the user doesn't accidentally mess up their data.

Designs: https://www.figma.com/file/Ip4CPowv3Uxxhu3klyXA0e/Generative-AI-in-Compass-MVP?type=design&node-id=2%3A17662&mode=dev