[Feature][python] Auto completion to CLI

[zhongjiajie]

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• I had searched in the issues and found no similar feature requirement.

Description

In #8516, we just add add basic use of CLI, it could be better if we add auto completion to it. whcih mean when user use

pydolphinscheduler <TAB>

in Bash, we will auto show the subcommand for them, just like below

pydolphinscheduler <TAB>

version

Use case

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Related issues

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Are you willing to submit a PR?

• Yes I am willing to submit a PR!

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