Re-translate the Japanese version (#1871)

* Retranslate Japanese docs with GPT-5.4

* Retranslate Japanese code with GPT-5.4

ja/codes/go/chapter_searching/two_sum_test.go

@@ -0,0 +1,24 @@
+// File: two_sum_test.go
+// Created Time: 2022-11-25
+// Author: reanon (793584285@qq.com)
+
+package chapter_searching
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestTwoSum(t *testing.T) {
+	// ======= Test Case =======
+	nums := []int{2, 7, 11, 15}
+	target := 13
+
+	// ====== Driver Code ======
+	// 方法 1：総当たり法
+	res := twoSumBruteForce(nums, target)
+	fmt.Println("方法1 res =", res)
+	// 方法2: ハッシュテーブル
+	res = twoSumHashTable(nums, target)
+	fmt.Println("方法2 res =", res)
+}