HarmonyOS 如何设置RichEditor字体居中

示例参考：

RichEditor({ controller: this.controllerRich })
  .width('100%')
  .height(40)
  .layoutWeight(1)
  .borderRadius(10)
  .backgroundColor(Color.Red)
  .margin({ top: 20, left: 14, bottom: 5 })
  .key('RichEditor')
  .id('id')
  .placeholder('平台提倡文明用语，请温柔发言哦~', { font: { size: 12 }, fontColor: '#999999' })
  .defaultFocus(true)
  .onReady(() => {
    this.controllerRich.addTextSpan("0123456789\n", {
      style: { fontColor: Color.Pink, fontSize: "32", },
      paragraphStyle: { textAlign: TextAlign.Center, leadingMargin: 16 }
    })
  }) 
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参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-basic-components-richeditor-V5#richeditorcontroller