Add debugging task for VS Code

This allows you to launch the command line program into a debugger. This
commit also tweaks the CI and fixes a small error in the build script.

tun/src/windows/queue.rs

@@ -1,19 +1 @@
-use crate::TunInterface;
-use std::os::unix::io::{AsRawFd, IntoRawFd, RawFd};
-
-pub struct TunQueue {
-    inner: crate::windows::sys::
-    inner: socket2::Socket,
-}
-
-impl AsRawFd for TunQueue {
-    fn as_raw_fd(&self) -> RawFd {
-        self.socket.as_raw_fd()
-    }
-}
-
-impl IntoRawFd for TunQueue {
-    fn into_raw_fd(self) -> RawFd {
-        self.socket.into_raw_fd()
-    }
-}
+pub struct TunQueue;