[FEATURE] Add checkstyle support in repo

[dhrubo-os]

Is your feature request related to a problem?
Currently in repo, we don't have any checkstyle for which we lose consistency, code quality, readable. This can also help us to prevent common mistakes.

We need to enable Checkstyle in our repo for all the modules.

In addition, we should add spotless for all the modules in the repo.

[TrungBui59]

@dhrubo-os can you assign me to this? I think I find a way to add spotless to the repo

[dhrubo-os]

@dhrubo-os can you assign me to this? I think I find a way to add spotless to the repo

We already have spotless for few modules. We need to add similar way for all the modules.

[TrungBui59]

yeah I will check for other modules as well

[dhrubo-os]

@TrungBui59 this PR already completing some of your work.

[ylwu-amzn]

Seems commons sub-project doesn't have checkstyle?

[dhrubo-os]

Closing this issue as this is implemented in this PR: #2658