can we add loading icon for auocomplate with search icon input

[Kimi1020]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.6.5

Environment

win10, chrome, 1.6.5

Reproduction link

https://www.antdv.com/components/auto-complete-cn/

Steps to reproduce

1. 使用使用autocomplete 组件并且带查询icon的那个input
2. 加了防抖，每停止输入1500ms触发一个ajax call去后台搜索查询 可能的结果
3. 在查询的时候，如果速度慢的话，是否可以把input的search icon变成loading icon

What is expected?

使用autocomplete 组件并且带查询icon的那个input， 是不是可以加一个ajax后台查询的时候，提供一个借口 比如loading，右边的icon就从search变成了loading icon

What is actually happening?

查询的时候如果卡顿了，就会出现假死， 好久以后才弹出

[tangjinzhou]

你可以参考这个示例自定义输入框和图标 https://www.antdv.com/components/auto-complete-cn/#components-auto-complete-demo-lookup-patterns---uncertain-category

[github-actions]

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