[refactor] update module and artifact name

[whhe]

What changes were proposed in this pull request?

Change the module/directory names of the project, and change the artifactId to be the same with module name.

Why are the changes needed?

This will make the project structure clearer.

Will break the compatibility? How if so?

No, the package name is not changed.

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Not needed.

Checklist

• [x] I've run the tests to see all new and existing tests pass.
• [ ] If this Pull Request resolves an issue, I linked to the issue in the text above.
• [ ] I've informed the technical writer about the documentation change if necessary.