feat: add cropper-demo

[DesignHhuang]

General

✏️ 添加图片裁剪 close: #139 注意：上传组件需要自己处理上传逻辑

• [x] Pull request template structure not broken

Type

ℹ️ What types of changes does your code introduce?

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• [x] New feature (non-breaking change which adds functionality)