Re-translate the Japanese version (#1871)

* Retranslate Japanese docs with GPT-5.4

* Retranslate Japanese code with GPT-5.4

ja/codes/zig/include/include.zig

@@ -0,0 +1,7 @@
+// File: include.zig
+// Created Time: 2023-01-07
+// Author: codingonion (coderonion@gmail.com)
+
+pub const PrintUtil = @import("PrintUtil.zig");
+pub const TreeUtil = @import("TreeNode.zig");
+pub const TreeNode = TreeUtil.TreeNode;