Add initial CI job for Windows target (#8088)

Clippy is disabled for now, due to many warnings in both `gpui` and
other code, see
https://github.com/zed-industries/zed/actions/runs/7980269779/job/21789529800
for more details.

Also, due to `#!/usr/bin/env bash` shebang in the `script/clippy`, it
starts in Windows CI with `shell: C:\Program Files\Git\bin\bash.EXE
-euxo pipefail {0}`

https://github.com/zed-industries/zed/actions/runs/7980269779/job/21789529800#step:4:3
It seems more appropriate to use PowerShell instead.

See `todo!("windows")` for all stubbed places currently.

Release Notes:

- N/A

crates/terminal/src/terminal.rs

@@ -396,7 +396,7 @@ impl TerminalBuilder {
         #[cfg(unix)]
         let (fd, shell_pid) = (pty.file().as_raw_fd(), pty.child().id());
 
-        // todo!(windows)
+        // todo!("windows")
         #[cfg(windows)]
         let (fd, shell_pid) = (-1, 0);
 
@@ -664,7 +664,7 @@ impl Terminal {
     fn update_process_info(&mut self) -> bool {
         #[cfg(unix)]
         let mut pid = unsafe { libc::tcgetpgrp(self.shell_fd as i32) };
-        // todo!(windows)
+        // todo!("windows")
         #[cfg(windows)]
         let mut pid = -1;
         if pid < 0 {