windows: Add support for SSH (#29145)

Closes #19892

This PR builds on top of #20587 and improves upon it.

Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

crates/net/src/stream.rs

@@ -0,0 +1,60 @@
+use std::{
+    io::{Read, Result, Write},
+    os::windows::io::{AsSocket, BorrowedSocket},
+    path::Path,
+};
+
+use async_io::IoSafe;
+use windows::Win32::Networking::WinSock::connect;
+
+use crate::{
+    socket::UnixSocket,
+    util::{init, map_ret, sockaddr_un},
+};
+
+pub struct UnixStream(UnixSocket);
+
+unsafe impl IoSafe for UnixStream {}
+
+impl UnixStream {
+    pub fn new(socket: UnixSocket) -> Self {
+        Self(socket)
+    }
+
+    pub fn connect<P: AsRef<Path>>(path: P) -> Result<Self> {
+        init();
+        unsafe {
+            let inner = UnixSocket::new()?;
+            let (addr, len) = sockaddr_un(path)?;
+
+            map_ret(connect(
+                inner.as_raw(),
+                &addr as *const _ as *const _,
+                len as i32,
+            ))?;
+            Ok(Self(inner))
+        }
+    }
+}
+
+impl Read for UnixStream {
+    fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
+        self.0.recv(buf)
+    }
+}
+
+impl Write for UnixStream {
+    fn write(&mut self, buf: &[u8]) -> Result<usize> {
+        self.0.send(buf)
+    }
+
+    fn flush(&mut self) -> Result<()> {
+        Ok(())
+    }
+}
+
+impl AsSocket for UnixStream {
+    fn as_socket(&self) -> BorrowedSocket<'_> {
+        unsafe { BorrowedSocket::borrow_raw(self.0.as_raw().0 as _) }
+    }
+}