Re-translate the Japanese version (#1871)

* Retranslate Japanese docs with GPT-5.4

* Retranslate Japanese code with GPT-5.4

ja/codes/javascript/chapter_tree/binary_tree.js

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+/**
+ * File: binary_tree.js
+ * Created Time: 2022-12-04
+ * Author: IsChristina (christinaxia77@foxmail.com)
+ */
+
+const { TreeNode } = require('../modules/TreeNode');
+const { printTree } = require('../modules/PrintUtil');
+
+/* 二分木を初期化 */
+// ノードを初期化
+let n1 = new TreeNode(1),
+    n2 = new TreeNode(2),
+    n3 = new TreeNode(3),
+    n4 = new TreeNode(4),
+    n5 = new TreeNode(5);
+// ノード間の参照（ポインタ）を構築する
+n1.left = n2;
+n1.right = n3;
+n2.left = n4;
+n2.right = n5;
+console.log('\n二分木を初期化\n');
+printTree(n1);
+
+/* ノードの挿入と削除 */
+const P = new TreeNode(0);
+// n1 -> n2 の間にノード P を挿入
+n1.left = P;
+P.left = n2;
+console.log('\nノード P を挿入後\n');
+printTree(n1);
+// ノード P を削除
+n1.left = n2;
+console.log('\nノード P を削除後\n');
+printTree(n1);