feat: Generic `tap-openapi`

[edgarrmondragon]

Feature scope

Taps (catalog, state, tests, etc.)

Description

Features

The idea is to support any OpenAPI sources and automatically

• discover streams (maybe based on user input for which paths and methods contain streams)
• dispatch the correct auth scheme, i.e. using the type key of the spec's security scheme

Challenges

• Actual compliance of the API with the OpenAPI spec.
• Many APIs send responses that don't fully match their documented schemas, so we'd need a way for users to supply overrides. Perhaps the Singer catalog is sufficient for this.