feat: 统一数据结构

Author: Hedwig-Fang

common/structures/TreeNode.js

@@ -51,4 +51,4 @@ class TreeNode {
     return result;
   }
 }
-module.exports = {TreeNode}
+module.exports = TreeNode

common/utils/parseStructure.js

@@ -1,6 +1,6 @@
 
 const {parse, toArray} = require('../structures/ListNode')
-const {TreeNode} = require('../structures/TreeNode')
+const TreeNode = require('../structures/TreeNode')
 const Node = require('../structures/Node')
 /**
  * 

test/tree.spec.ts

@@ -1,5 +1,5 @@
 import {test, expect, describe} from 'vitest';
-const {TreeNode} = require('../common/structures/TreeNode');
+const TreeNode = require('../common/structures/TreeNode');
 const mockTree = [1, 2, 3];
 const mockTree2 = [1,null, 2]
 test('测试树', ()=>{