feat: Set chat name (#4974)

Set chat name with `/name` so they appear in the codex resume page:


https://github.com/user-attachments/assets/c0252bba-3a53-44c7-a740-f4690a3ad405

codex-rs/mcp-server/src/codex_tool_runner.rs

@@ -279,6 +279,7 @@ async fn run_codex_tool_session_inner(
                     | EventMsg::TurnAborted(_)
                     | EventMsg::ConversationPath(_)
                     | EventMsg::UserMessage(_)
+                    | EventMsg::SessionRenamed(_)
                     | EventMsg::ShutdownComplete
                     | EventMsg::ViewImageToolCall(_)
                     | EventMsg::EnteredReviewMode(_)