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/linear_search_test.go

@@ -0,0 +1,26 @@
+// File: linear_search_test.go
+// Created Time: 2022-11-25
+// Author: Reanon (793584285@qq.com)
+
+package chapter_searching
+
+import (
+	"fmt"
+	"testing"
+
+	. "github.com/krahets/hello-algo/pkg"
+)
+
+func TestLinearSearch(t *testing.T) {
+	target := 3
+	nums := []int{1, 5, 3, 2, 4, 7, 5, 9, 10, 8}
+
+	// 配列で線形探索を行う
+	index := linearSearchArray(nums, target)
+	fmt.Println("対象要素 3 のインデックス =", index)
+
+	// 連結リストで線形探索を行う
+	head := ArrayToLinkedList(nums)
+	node := linearSearchLinkedList(head, target)
+	fmt.Println("対象ノード値 3 に対応するノードオブジェクト =", node)
+}