HarmonyOS 富文本组件RichEditor并不能编辑html格式数据，想实现html格式编辑的解决方案

目前还没有可以同时展示和编辑html的组件，可尝试下列方案，案例如下：

@Entry
@Component
struct RichTextExample {
  @State data: string = '<h1 style="text-align: center;">h1标题</h1>' +
    '<h1 style="text-align: center;"><i>h1斜体</i></h1>' +
    '<h1 style="text-align: center;"><u>h1下划线</u></h1>' +
    '<h2 style="text-align: center;">h2标题</h2>' +
    '<h3 style="text-align: center;">h3标题</h3>' ;
  controller: RichEditorController = new RichEditorController();
  options: RichEditorOptions = { controller: this.controller };
  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Start,
      justifyContent: FlexAlign.Start }) {
      RichText(this.data)
        .onStart(() => {
          console.info('RichText onStart');
        })
        .onComplete(() => {
          console.info('RichText onComplete');
        })
        .width('100%')
        .height(300)
        .backgroundColor(0XBDDB69)
      RichEditor(this.options)
        .onReady(()=>{
          this.controller.addTextSpan(this.data,
            {
              style:
              {
                fontColor: Color.Orange,
                fontSize: 30
              }
            })
        })
        .onIMEInputComplete((value: RichEditorTextSpanResult) => {
          this.data = value.value
        })
        .borderWidth(1)
        .borderColor(Color.Green)
        .width("100%")
        .height(400)
    }
  }
}