[Feature] Support GitHub Action

[godruoyi]

What happened?

I really like this tool, it is much more useful than Google Java format. I have searched our documents and code but did not find how to integrate into github action. Is there any way we can use github action to automatically format the code when we submit it to github?

[busches]

You can use the standard java action with maven and run mvn spotless:apply, see here for more examples on setting that up: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven