API-side support for Wikipedia, DBpedia and internet search functions This incorporates a refactor of the API code to break it up, separate classes for endpoints to reduce duplication
* Changed the JSONNET for prompt-template so that prompt templates are
simpler. This tidies default-prompts.jsonnet so it's easier to see
where the prompts are.
* Updated prompt override templates to match new structure
Added templates which produce K8s resources. With the provided GCP wrapper, it works on GCP K8s cluster. This isn't stable enough for other folks to use so will need more piloting before it can be documented and released.
