Add support for a server timeout on Windows for the mypy daemon

[emmatyping]

Due to limitations of the synchronous API of NamedPipes, the server will wait forever when waiting on a client connection. We should move to overlapped I/O, so the server can support timeouts, though it will likely bit a bit painful to change this.

[msullivan]

https://memset.wordpress.com/2010/10/08/timeout-on-named-pipes/ has some example code for doing it.

_winapi looks like it has decent support for using overlapped IO (and does some extra stuff to help out that I think would make it simpler than that example code).

The typeshed stubs don't seem to include that support, though, so those should get updated too.