feat: ScreenShot

[Torstentjh]

#3752

[doraemonxxx]

Hi there 🤗

Is a screenshot feature essential? Numerous tools are available for taking screenshots, including the default Windows OS screen capture function and Chrome extensions like Awesome Screenshot.

In some cases, if we want to export a chart, we could utilize the default export feature of ECharts. In my opinion, the feasibility of this feature is quite low, and not all users or developers would necessarily want or use it.

Thanks

[Torstentjh]

hello 😄 @doraemonxxx
I think you are right, but this library also has many stars, which shows that it also has many usage scenarios. The main reason is that I saw this issue and communicated with the project members, so I made this function