Re-translate the Japanese version (#1871)

* Retranslate Japanese docs with GPT-5.4

* Retranslate Japanese code with GPT-5.4

ja/codes/cpp/chapter_stack_and_queue/deque.cpp

@@ -6,41 +6,41 @@
 
 #include "../utils/common.hpp"
 
-/* ドライバーコード */
+/* Driver Code */
 int main() {
     /* 両端キューを初期化 */
     deque<int> deque;
 
-    /* 要素エンキュー */
+    /* 要素をエンキュー */
     deque.push_back(2);
     deque.push_back(5);
     deque.push_back(4);
     deque.push_front(3);
     deque.push_front(1);
-    cout << "Double-ended queue deque = ";
+    cout << "両端キュー deque = ";
     printDeque(deque);
 
     /* 要素にアクセス */
     int front = deque.front();
-    cout << "Front element of the queue front = " << front << endl;
+    cout << "先頭要素 front = " << front << endl;
     int back = deque.back();
-    cout << "Back element of the queue back = " << back << endl;
+    cout << "末尾要素 back = " << back << endl;
 
-    /* 要素デキュー */
+    /* 要素をデキュー */
     deque.pop_front();
-    cout << "Front element dequeued = " << front << ", after dequeuing from the front";
+    cout << "先頭から取り出した要素 popFront = " << front << "、先頭から取り出した後の deque = ";
     printDeque(deque);
     deque.pop_back();
-    cout << "Back element dequeued = " << back << ", after dequeuing from the back";
+    cout << "末尾から取り出した要素 popLast = " << back << "、末尾から取り出した後の deque = ";
     printDeque(deque);
 
     /* 両端キューの長さを取得 */
     int size = deque.size();
-    cout << "Length of the double-ended queue size = " << size << endl;
+    cout << "両端キューの長さ size = " << size << endl;
 
     /* 両端キューが空かどうかを判定 */
     bool empty = deque.empty();
-    cout << "Is the double-ended queue empty = " << empty << endl;
+    cout << "両端キューが空かどうか = " << empty << endl;
 
     return 0;
-}
+}