CLI - start VATZ

[rootwarp]

Checklist

• New Feature for the SVC/Plugin
• New Feature for CI/CD
• Enhancement on Vatz
• Others(etc. e.g, documentation,...)

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Please describe, what it's about or related Problem with

A clear description of what feature need to be developed or enhanced in Vatz

Restructuring VATZ to CLI style.
For starting point, implement start command.

Describe the output that you are expecting for above

A clear and concise description of what you expect to happen.

After this issue,
we can start VATZ with ~$ vatz start

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

N/A

Additional context

Add any other context or screenshots about the feature request here.