generate requests for an operation

[karenetheridge]

Getty wants a thing that generates an http request for an operation, given some input parameters.

https://metacpan.org/release/GETTY/Langertha-0.004/source/lib/Langertha/Role/HTTP.pm#L37

This might belong in its own distribution, oriented towards client things.

Will have to include hooks for media type serializers. Since we will need deserializers as well (for decoding the response to send back to the client), perhaps we pull out the existing media type deserializers that live in JSM (for the purposes of implementing the contentMediaType keyword, but are also used for content validation in OpenAPI::Modern).