提个建议：React示例代码可以换成hooks版本吗

[qinfeng0214]

Is your feature request related to a problem? Please describe. 目前市面上主流UI库的React版本示例代码都是hooks版本的，Class写法越来越少。king design 最近发布了v3版本，期待示例代码也能更符合技术趋势

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