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