Open AI - Support Structured Output aka JSON

[MichaelDoyle]

We got some feedback through the Genkit survey that this was missing.

See also Open AI docs: https://platform.openai.com/docs/guides/structured-outputs

[EPMatt]

Hey @MichaelDoyle, thanks for opening a feature request ticket here.

@Dabolus, could you take a look at this?

[AshleyTuring]

Upvote: Would appreciate this one - thank you

[xavidop]

hi, we have merged the openai plugin to the cre of the framework to have 1st tier support, please open the issue there: https://github.com/firebase/genkit/tree/main/js/plugins/compat-oai