feat(prompts): Save and load invocation parameters from/into playground (#5942)

* feat(prompts): Save and load invocation parameters from/into playground

Also includes output schema

* Include response_format and fix invocation param formatting in code snippets

* Fix prompt combobox change handler

* Add OutputSchema display to prompt details

Also add border control props to Disclosure and SectionHeader.
We do some weird sibling-ry and nesting that makes borders hard to auto-apply with css alone

* Remove confusing prop in favor off css

* Consolidate prompt/instance conversion logic and parse tool_choice