Spring-ai extension function for Chatclient.CalLResponseSpec.entity(Class<?>) a…

this adds kotlin support for using the ChatClient to get typesafe responses back

val joke:Joke = cc
      .prompt("tell me a joke")
      .call()
      .entity<Joke>()
println(joke)

this is as opposed to the more verbose and less idiomatic Kotlin code without the extension function

` val joke : Joke = cc .prompt("tell me a joke") .call() .entity(Joke::class.java)

Comment From: sdeleuze

Also please add an extension for responseEntity(...) as well.

Comment From: joshlong

ive updated the PR accordingly. thanks for the great feedback

Comment From: markpollack

merge in 944fb996e421d3a9cded77220551bc710957eb6b