### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) ### Search before asking - [X] I have searched in the [issues](https://github.com/apache/incubator-uniffle/issues?q=is%3Aissue) and found no similar issues. ### What would you like to be improved? Make all uniifle class under org.apache.uniffle package to avoid conflict. Something like spark mr tez client sdk. ### How should we improve? Make all uniifle class under org.apache.uniffle package to avoid conflict. ### Are you willing to submit PR? - [X] Yes I am willing to submit a PR!