Ntex websocket benchmark

[goosedozer]

Hi, it would be great to see the performance of ntex websockets (it is considered the fastest rust framework). And maybe low-level crate "ws-tool"

[nurmohammed840]

Feel free to submit new benchmarks. I will gladly accept any pull request.

[aurexav]

I added ws-tool to https://github.com/hack-ink/websocket-benchmark.