Format all Rust sources and clean up repository checks (#57314)

## Why

Rust formatting should include source files that Cargo cannot discover, while keeping command lines within Windows limits.

## What changed

- Update `scripts/format.py` to discover tracked and non-ignored untracked Rust files with Git and invoke `rustfmt` in batches of 64 files. Use the workspace configuration and skip recursive child-module formatting.
- Pass `SystemDrive` and `LOCALAPPDATA` to Windows Bazel tests.
- Extend the spelling allowlist, remove a manifest feature exception, and clean up an unused import, an empty MCP scenario module, and its snapshot.

GitOrigin-RevId: c0d625fda9290ead6a63919325d65f7352abfa40

codex-rs/app-server/src/message_processor.rs

@@ -385,11 +385,11 @@ impl MessageProcessor {
                     outgoing.clone(),
                     thread_state_manager.clone(),
                 )),
-                Some({
+                {
                     let time_provider =
                         app_server_time_provider(outgoing.clone(), thread_state_manager.clone());
-                    time_provider
-                }),
+                    Some(time_provider)
+                },
             );
             match code_mode_session_provider {
                 Some(provider) => manager.with_code_mode_session_provider(provider),