Simpler syntax for defining responses' schema

[utybo]

Currently:

get("/hello") {
    respond(Greeting("You"))
} describe {
    summary = "Greet someone"
    200 response {
        json { schema<Greeting>(Greeting("Hi!")) }
    }
}

I think it would be possible to implement the invoke operator on the various valid types to allow the following syntax instead:

200 response {
    json<Greeting>(Greeting("Hi!"))
    (json or xml)<Greeting>(Greeting("Hi!"))
}

[utybo]

This is not possible until Kotlin's context() feature lands, because otherwise this requires defining an inline extension function (because of reified generic types) in BodyDsl