Currently, our core and side module dependent on each others. and will cause
cycle import in our codebase, especially in issue #10905, we try to refactor
to solve this problem.

This patch do the following change:

* Rename module `side` to `models`
* Move `core/base` and `core/sidebase` to dir `modules`
* Move `configuration` and `default_config.yaml` to the root of pydolphinscheduler

* [python] Add config mechanism and cli subcommand config

* Add configuration.py mechanism for more easy change config
  and move some configs to it. It mechanism including
  configuration.py module and default_config.yaml file
* Add `config` for cli subcommand allow users initialize, get,
  set configs

close: #8344

* Change setup.py format

* Add isort config file to fix conflict with black
* Add some doc about isort

* [python] Add code style lint for GA

* Change github action name

* Auto change by black

* Fix flake8

* Fix broken link for pyds README.md

* Auto fix by black

* Separate GitHub workflows

* Add Black badge and CI locally in README.md

* Init DS python SDK pydolphinscheduler: python code definition

* Doc first

* Add quick start and developer doc

* Java documentation change

* Add LICENSE-py4j.txt

* Add py4j to release-docs/LICENSE

* Move dependency version to parent pom

* Remove outdated code

* Add tenant parameter to tutorial