Support OpenAPI endpoint summary in addition to description

[wi101]

Is your feature request related to a problem? Please describe.
When I add a description to my endpoint, it will be used as both summary and description

Describe the solution you'd like
Add support for defining an OpenAPI summary on endpoints, alongside description.

Describe alternatives you've considered
Suggestion

 Endpoint(POST / "example", summary: "Submit a test request") ?? Doc.p("This endpoint lets you submit RESTRICT, ERASURE, and ACCESS requests for testing...")