Console should not require "body" in the form for http requests

[wesbillman]

type EchoRequest = builtin.HttpRequest[builtin.Empty]

type Message struct {
	Message string `json:"message"`
}
type EchoResponse = builtin.HttpResponse[Message, ftl.Unit]

Will show the raw body etc. in the console instead of having the root be the body. This should work given that Headers are on their own tab.

So the Body tab for a http ingress should just be the ... body of the request.

{}