* Fix remaining style errors and wildcard imports

* Upgrade spotless to the latest stable version, exclude .github folder from spotless check and fix dead link

* Fix spotless matching scope of markdown files

To make our release process easier, I plan to mark milestone
and label is required before the PR merged, they use for

* label: In this path we required label with at least on with
  'feature|bug|improvement|document|chore' to make our changelog
  more convenient
* milestone: For easier to cherry-pick PR, currently some of
  our milestone only exists in issue and not exists in related
  PR, it may

Co-authored-by: Kirs <ACM_China@yeah.net>

* [Bug][Doc] Fix typo in docs

* Remove dead links and update related docs