官方示例的package-example中，所依赖的f-my等平台的包均不存在，无法运行示例

- [ ] I have searched the [issues](https://github.com/antvis/f2/issues) of this repository and believe that this is not a duplicate.

### Reproduction link
[https://github.com/antvis/F2/tree/master/packages/f2-my/examples/test](https://github.com/antvis/F2/tree/master/packages/f2-my/examples/test)

### Steps to reproduce
运行仓库的支付宝/微信/xxx 平台的example中 项目均无法运行，因为旧版本包已不存在，并且官方对应的网站也均失效。是否会维护demo

| Environment | Info |
|---|---|
| f2 | 5.5.2 |
| System | - |
| Browser | - |

Start with packages/f2-my/examples/test and run the platform examples described in the issue to identify which dependencies are unavailable. Check the package references and the linked platform documentation, then determine whether each example can be restored with supported packages or should be marked as unavailable. Done means the affected examples run successfully or their unsupported status is clearly documented.

Written by the indexing model from the issue text.