docs: support document internationalization #222

* docs: add English docuemnt #213

* docs: support document internationalization #222

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Co-authored-by: Hufe921 <huangyunfeihufe@hotmail.com>

docs/en/guide/command-get.md

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+# Get Data Command
+
+## How to Use
+
+```javascript
+import Editor from "@hufe921/canvas-editor"
+
+const instance = new Editor(container, <IElement[]>data, options)
+const value = instance.command.commandName()
+```
+
+## getValue
+
+Feature: Get the current document value
+
+Usage:
+
+```javascript
+const {
+  version: string;
+  width: number;
+  height: number;
+  margins: IMargin;
+  header?: IHeader;
+  watermark?: IWatermark;
+  data: IEditorData;
+} = instance.command.getValue(options?: IGetValueOption)
+```
+
+## getImage
+
+Feature: Gets the base64 string of the current page image
+
+Usage:
+
+```javascript
+const base64StringList = await instance.command.getImage(pixelRatio?: number)
+```
+
+## getWordCount
+
+Feature: Get document word count
+
+Usage:
+
+```javascript
+const wordCount = await instance.command.getWordCount()
+```
+
+## getRangeText
+
+Feature: Get selection text
+
+Usage:
+
+```javascript
+const rangeText = instance.command.getRangeText()
+```
+
+## getRangeContext
+
+Feature: Get selection context
+
+Usage:
+
+```javascript
+const rangeContext = instance.command.getRangeContext()
+```
+
+## getPaperMargin
+
+Feature: Gets the margins
+
+Usage:
+
+```javascript
+const [top: number, right: number, bottom: number, left: number] =
+  instance.command.getPaperMargin()
+```
+
+## getSearchNavigateInfo
+
+Feature: Get search navigation information
+
+Usage:
+
+```javascript
+const {
+  index: number;
+  count: number;
+} = instance.command.getSearchNavigateInfo()
+```
+
+## getCatalog
+
+Feature: Get directory
+
+Usage:
+
+```javascript
+const catalog = await instance.command.getCatalog()
+```
+
+## getHTML
+
+Feature: Get HTML
+
+Usage:
+
+```javascript
+const {
+  header: string
+  main: string
+  footer: string
+} = await instance.command.getHTML()
+```