Add browser and computer use configuration (#40018)

## What changed

- Add typed `browser_use` settings for history access and per-origin access,
  download, upload, and full CDP policies.
- Add typed `computer_use` settings for default app access, macOS bundle IDs,
  Windows AUMIDs, and Windows executable identities.
- Expose the merged settings through app-server config reads and generated
  Rust, TypeScript, and JSON schemas.

## Testing

- Cover TOML serialization round trips, layered config reads with origin
  metadata, and app-server batch writes.

GitOrigin-RevId: 78065f6fec990602071fc81ff639ff97f7ad8cd5

codex-rs/app-server-protocol/src/protocol/v2/mod.rs

@@ -4,8 +4,10 @@ mod account;
 mod apps;
 mod attestation;
 mod bedrock;
+mod browser_use_config;
 mod collaboration_mode;
 mod command_exec;
+mod computer_use_config;
 mod config;
 mod current_time;
 mod diagnostics;
@@ -36,8 +38,10 @@ pub use account::*;
 pub use apps::*;
 pub use attestation::*;
 pub use bedrock::*;
+pub use browser_use_config::*;
 pub use collaboration_mode::*;
 pub use command_exec::*;
+pub use computer_use_config::*;
 pub use config::*;
 pub use current_time::*;
 pub use diagnostics::*;