doc: 增加文档

Author: ArgoZhang

src/BootstrapBlazor.Server/Locales/en-US.json

@@ -6680,6 +6680,8 @@
     "Title": "Image cropper",
     "ImageCropperNormalText": "Basic usage",
     "ImageCropperNormalIntro": "The URL of the image can be set by setting the <code>Url</code> parameter. The cropping ratio can be set by setting <code>ImageCropperOption.AspectRatio=16/9f</code>. <code>1</code> is a square.",
+    "ImageCropperRoundText": "Round",
+    "ImageCropperRoundIntro": "Set the cropping mode to circular by setting the <code>IsRound</code> parameter",
     "ImageCropperResetText": "Reset",
     "ImageCropperReplaceText": "Replace",
     "ImageCropperRotateText": "Rotate",

src/BootstrapBlazor.Server/Locales/zh-CN.json

@@ -6680,6 +6680,8 @@
     "Title": "ImageCropper 图像裁剪",
     "ImageCropperNormalText": "基础用法",
     "ImageCropperNormalIntro": "通过设置 <code>Url</code> 参数设置图片地址，可通过设置 <code>ImageCropperOption.AspectRatio=16/9f</code> 设置裁剪框比例，<code>1</code> 时为正方形",
+    "ImageCropperRoundText": "圆角",
+    "ImageCropperRoundIntro": "通过设置 <code>IsRound</code> 参数设置裁剪方式为圆形",
     "ImageCropperResetText": "复位",
     "ImageCropperReplaceText": "替换",
     "ImageCropperRotateText": "旋转",