Feature Request: Make chaining possible for extension variants

[mervyn-mccreight]

As described here the usual way extension variants are implemented throughout the kotest core assertions is that they allow chaining multiple assertions.

This is useful for e.g. chaining multiple assertions on one test-subject in an easy way.

Is there something Ktor specific that speaks against this for HttpResponse and/or TestApplicationResponse?

[mervyn-mccreight]

I'd be happy to work on this, I just wanted to clarify whether this is wanted or not before putting effort into it 😄

[Kantis]

I think this could be useful , feel free to open a PR