Re-translate the Japanese version (#1871)

* Retranslate Japanese docs with GPT-5.4

* Retranslate Japanese code with GPT-5.4

ja/codes/go/chapter_computational_complexity/iteration_test.go

@@ -0,0 +1,26 @@
+// File: iteration_test.go
+// Created Time: 2023-08-28
+// Author: Reanon (793584285@qq.com)
+
+package chapter_computational_complexity
+
+import (
+	"fmt"
+	"testing"
+)
+
+/* Driver Code */
+func TestIteration(t *testing.T) {
+	n := 5
+	res := forLoop(n)
+	fmt.Println("\nfor ループの合計結果 res = ", res)
+
+	res = whileLoop(n)
+	fmt.Println("\nwhile ループの合計結果 res = ", res)
+
+	res = whileLoopII(n)
+	fmt.Println("\nwhile ループ（2 回更新）の合計結果 res = ", res)
+
+	resStr := nestedForLoop(n)
+	fmt.Println("\n二重 for ループの走査結果 ", resStr)
+}