### Search before asking - [X] I had searched in the [issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and found no similar feature requirement. ### Description * Currently, DS does not have docs about how to use `Sqoop` task plugin. We need docs and examples for it.  ### Documentation Links * https://dolphinscheduler.apache.org/en-us/docs/latest/user_doc/about/introduction.html ### Are you willing to submit a PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)