docs: add word tool

docs/guide/command-execute.md

@@ -597,4 +597,12 @@ instance.command.executeSetLocale(locale: string)
 用法：
 ```javascript
 instance.command.executeLocationCatalog(titleId: string)
+```
+
+## executeWordTool
+功能：文字工具（删除空行、行首空格）
+
+用法：
+```javascript
+instance.command.executeWordTool()
 ```