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/zed/src/languages/csharp.rs

@@ -81,11 +81,15 @@ impl super::LspAdapter for OmniSharpAdapter {
             archive.unpack(container_dir).await?;
         }
 
-        fs::set_permissions(
-            &binary_path,
-            <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
-        )
-        .await?;
+        // todo!("windows")
+        #[cfg(not(windows))]
+        {
+            fs::set_permissions(
+                &binary_path,
+                <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
+            )
+            .await?;
+        }
         Ok(LanguageServerBinary {
             path: binary_path,
             arguments: server_binary_arguments(),