fix(generator): fix error where value in order is not in category

[mengshang918]

Motivation

修复generator中自定义组件区，order中的值不在cateogory中导致报错的问题

• 报错例子

  components={{
         order: ['a', 'antd'],
         category: {
           a: {
             title: 'a',
             order: [],
             fields: {},
           },
         },
       }}
  

• 修复后，会自动过滤order中的antd

Have you read the Contributing Guidelines on pull requests?

Y

Test Plan

N

Related PRs

N