Add Go codes to docs, including

the chapter of stack and queue, the chapter of tree.

codes/javascript/chapter_array_and_linkedlist/array.js

@@ -7,7 +7,7 @@
 /* 随机访问元素 */
 function randomAccess(nums){
     // 在区间 [0, nums.length) 中随机抽取一个数字
-    const random_index  = Math.floor(Math.random() * nums.length)
+    const random_index = Math.floor(Math.random() * nums.length)
     // 获取并返回随机元素
     random_num = nums[random_index]
     return random_num

codes/javascript/chapter_sorting/insertion_sort.js

@@ -21,4 +21,4 @@ function insertionSort(nums) {
 /* Driver Code */
 var nums = [4, 1, 3, 1, 5, 2]
 insertionSort(nums)
-console.log("排序后数组 nums = ", nums)
+console.log("排序后数组 nums =", nums)