Feat make smarter

[waziers]

• generation JSON output from Gemini instead of the URL so we can combine the different outputs
• Add jest for testing the generation of the various components of the url. Currently only works with the Cloud Function endpoint
• Split the visualization and filter parameter generation into separate calls to be built and tested separately
• Zero-example filter and visualization generation using the documentation
• Supply the documentation to Gemini in Mardkown
• build the explore URL in JS instead of relying on Gemini (which might hallucinate)
• validate the filters using explicit rules
  • don't include filters for unknown fields
  • don't include filter values that don't validate (they are hallucinations)
• tests for filter value validation

Todo:

• add more test coverage for filter and visualization generation
• include visualization config in final output
• add support for the bigquery backend in test mode by instantiating the looker SDK in jest
• create better URL validation to prevent 404 on the page. The URL should always load, even if it has some mistakes.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.