Optimize the module structure of the xtable

[daragu]

Feature Request / Improvement

Optimize the module structure of the xtable

• add same prefix to sub modules
• let the folder name of the module to match the artifactId

Changes

• api -> xtable-api
• core -> xtable-core
• hudi-support -> xtable-hudi-support
• utilities -> xtable-utilities
• website -> xtable-website

Are you willing to submit PR?

• [X] Yes I am willing to submit a PR!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct