🤔 [QUESTION] 关于扇形仪表盘FanGauge

### 🐛 Question description [Please make everyone to understand it]
我在文档中看到有扇形仪表盘FanGauge，在使用过程中发现 模块“"@antv/g2plot"”没有导出的成员“FanGauge”
### 💻 Link to minimal reproduction

Please provide a link by forking these links [g2plot](https://codesandbox.io/s/g2plot-reproduction-template-gyej1) or GitHub repo. What is a minimal reproduction, and why is it required?

```react
import { FanGauge } from "@antv/g2plot"; // 模块“"@antv/g2plot"”没有导出的成员“FanGauge”。

const DemoGauge: React.FC<{ value: number }> = ({ value }) => {
const containerRef = useRef(null);
useEffect(()=>{
const container = containerRef.current;
const config = {
title: {
visible: true,
text: '扇形仪表盘',
},
width: 400,
height: 400,
value: value,
min: 0,
max: 100,
range: [0, 70],
format: (v) => {
return v + '%';
},
color: ['l(0) 0:#b0d0ff 1:#5f92f9'],
}
const fanGauge = new FanGauge(container, config);
fanGauge.render();

return () => {
fanGauge.destroy();
}
})

return

Compare the documentation entry for FanGauge with the @antv/g2plot v2.4.31 package exports, then run the provided React snippet in the linked G2Plot reproduction template. Done means the supported status and usage of FanGauge are clear and the documentation and package exports no longer disagree.

Written by the indexing model from the issue text.