Add an example tcp_echo_server_non_blocking

[Heap-Hop]

#25

[pchickey]

Thanks for submitting this.

We will want to exercise this with a test like we do for the tcp_echo_server.

As far as the style, this uses futures for StreamTasks and we were considering recommending futures-concurrency (#17) for this sort of thing - would you be up for translating it to use that?

[Heap-Hop]

we were considering recommending futures-concurrency

Done.

It does need a test, but due to bytecodealliance/wasmtime#9667, I haven’t found a good way to write one yet.

[pchickey]

I don't think we want to return as Ready until both the Listener is ready and the stream tasks are all complete.

[Heap-Hop]

Sorry, I didn't quite understand what you meant. Could you please tell me your thoughts directly?

[pchickey]

Sorry, working on this crate fell off my radar for a bit as I started a new job.

I have merged the my rewrite of the reactor and streams abstractions (#35, #37). I'm now back to looking at the work you did while I was focusing on that work.

[pchickey]

With #86, this example has been changed to use tasks, and so it no longer has the blocking behavior.

[Heap-Hop]

Cool!
Nice to see the wstd::runtime::spawn function!