Feature: Generate Schemas From OpenAPI Schema

[Adzz]

https://spec.openapis.org/oas/v3.1.0#fixed-fields-11

I think we should be able to go some way to generating schemas based on open API schema file.

There are a lot of questions here, and supporting it in the general case might be very tricky. But we can start simple. It's possible this should be another repo though that you can optionally add... But we can start here and see where it gets us.

The idea is to get at least 80% of the way to written schemas (inline or not?). That would making creating API clients extrememly easy by letting us ingest the schema create schemas and programatically create a client for any API!

[Adzz]

Branch started here: https://github.com/Adzz/data_schema/tree/open-api