[codex] Initialize ICU data for code mode V8 (#17709)

Link ICU data into code mode, otherwise locale-dependent methods cause a
panic and a crash.

codex-rs/code-mode/src/service.rs

@@ -561,6 +561,85 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn date_locale_string_formats_with_icu_data() {
+        let service = CodeModeService::new();
+
+        let response = service
+            .execute(ExecuteRequest {
+                source: r#"
+const value = new Date("2025-01-02T03:04:05Z")
+  .toLocaleString("fr-FR", {
+    weekday: "long",
+    month: "long",
+    day: "numeric",
+    hour: "2-digit",
+    minute: "2-digit",
+    second: "2-digit",
+    hour12: false,
+    timeZone: "UTC",
+  });
+text(value);
+"#
+                .to_string(),
+                yield_time_ms: None,
+                ..execute_request("")
+            })
+            .await
+            .unwrap();
+
+        assert_eq!(
+            response,
+            RuntimeResponse::Result {
+                cell_id: "1".to_string(),
+                content_items: vec![FunctionCallOutputContentItem::InputText {
+                    text: "jeudi 2 janvier \u{e0} 03:04:05".to_string(),
+                }],
+                stored_values: HashMap::new(),
+                error_text: None,
+            }
+        );
+    }
+
+    #[tokio::test]
+    async fn intl_date_time_format_formats_with_icu_data() {
+        let service = CodeModeService::new();
+
+        let response = service
+            .execute(ExecuteRequest {
+                source: r#"
+const formatter = new Intl.DateTimeFormat("fr-FR", {
+  weekday: "long",
+  month: "long",
+  day: "numeric",
+  hour: "2-digit",
+  minute: "2-digit",
+  second: "2-digit",
+  hour12: false,
+  timeZone: "UTC",
+});
+text(formatter.format(new Date("2025-01-02T03:04:05Z")));
+"#
+                .to_string(),
+                yield_time_ms: None,
+                ..execute_request("")
+            })
+            .await
+            .unwrap();
+
+        assert_eq!(
+            response,
+            RuntimeResponse::Result {
+                cell_id: "1".to_string(),
+                content_items: vec![FunctionCallOutputContentItem::InputText {
+                    text: "jeudi 2 janvier \u{e0} 03:04:05".to_string(),
+                }],
+                stored_values: HashMap::new(),
+                error_text: None,
+            }
+        );
+    }
+
     #[tokio::test]
     async fn output_helpers_return_undefined() {
         let service = CodeModeService::new();