feat: /review (#3774)

Adds `/review` action in TUI

<img width="637" height="370" alt="Screenshot 2025-09-17 at 12 41 19 AM"
src="https://github.com/user-attachments/assets/b1979a6e-844a-4b97-ab20-107c185aec1d"
/>

codex-rs/exec/src/event_processor_with_human_output.rs

@@ -558,6 +558,9 @@ impl EventProcessor for EventProcessorWithHumanOutput {
                 TurnAbortReason::Replaced => {
                     ts_println!(self, "task aborted: replaced by a new task");
                 }
+                TurnAbortReason::ReviewEnded => {
+                    ts_println!(self, "task aborted: review ended");
+                }
             },
             EventMsg::ShutdownComplete => return CodexStatus::Shutdown,
             EventMsg::ConversationPath(_) => {}