Add build script for Go and update Go codes.

docs/chapter_searching/linear_search.md

@@ -33,18 +33,7 @@ comments: true
 === "Go"
 
     ```go title="linear_search.go"
-    /* 线性查找（数组） */
-    func linearSearchArray(nums []int, target int) int {
-        // 遍历数组
-        for i := 0; i < len(nums); i++ {
-            // 找到目标元素，返回其索引
-            if nums[i] == target {
-                return i
-            }
-        }
-        // 未找到目标元素，返回 -1
-        return -1
-    }
+    [class]{}-[func]{linearSearchArray}
     ```
 
 === "JavaScript"
@@ -106,19 +95,7 @@ comments: true
 === "Go"
 
     ```go title="linear_search.go"
-    /* 线性查找（链表）*/
-    func linerSearchLinkedList(node *ListNode, target int) *ListNode {
-        // 遍历链表
-        for node != nil {
-            // 找到目标结点，返回之
-            if node.Val == target {
-                return node
-            }
-            node = node.Next
-        }
-        // 未找到目标元素，返回 nil
-        return nil
-    }
+    [class]{}-[func]{linearSearchLinkedList}
     ```
 
 === "JavaScript"