test: add hypertest scenario

[tpluscode]

This PR add and e2e scenario executed with hypertest

It almost could replace the supertest+jest fixture but it's also testing different aspects.

I am considering adding a very broad scenario assertion like

With Each Response {
    Expect Header Link hydra:ApiDocumentation
    Expect Header Access-Control-Allow-Origin "*"
    Expect Header Access-Control-Expose-Headers "*"
}

Checking the media type is not a great idea, because the server could return any RDF format

[tpluscode]

ping @angelo-v @alien-mcl