docs: move out stream example from testing

[Jerome1337]

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[Uzlopak]

@Jerome1337
Please elaborate

[Jerome1337]

@Uzlopak The stream example seems to be misplaced.

When I was trying to test my endpoint using the doc example. I was wondering why there was a websocket stream example that wasn't used on the test example itself. I found it pretty confusing.

I may have misunderstood the example 🙃