[Documentation] supplement document and demo

Documentation Title or Section

孙锐补充下这俩：

  // resize response time
  resizeTime?: number;

  canvas?: HTMLCanvasElement;
  viewBox?: IBoundsLike;
  chartOption?: any;
  disableInteraction?: boolean;


  beforeRender?: (stage: any) => void;
  afterRender?: (stage: any) => void;

雪飞加下下面这俩的：

  // 渲染时的 spec 改变
  specFormat?: (
    spec: any,
    chartInstance: any,
    chart: any
  ) => { needFormatSpec: boolean; spec?: any; updateSpec?: boolean };
  // chart 单元格 的 spec 生成时的转换
  specTransformInCell?: (spec: any, col: number, row: number) => any;

Issue Description or Suggestion

supplement document and demo