[Feature] faker.js support for generating realistic test data

[SjaaLom]

Hi, it would be cool to have the integrated functionality of the faker.js library. (tutorial)
This library makes it possible to call an endpoint with "real" looking data, that is different for every call. Useful for running tests on your api.

POST http://host/api/users HTTP/1.1
Content-Type: application/json

{
  "firstname": "{{$faker name.firstname}}",
  "lastname": "{{$faker name.lastname}}",
  "bio": "{{$faker lorum.words(20)}}"
}

Personally I could really use this in my test scripts, so I already took the liberty of creating a pull request for it.

But I am sure the community has some useful additions, remarks or other feedback to make this even better.
For instance, there was already some feedback suggesting to add intellisense for the available faker.js commands. This is indeed a great idea.

I would like to know if you guys and gals need this at all or how you would make this even better.

Thoughts?