support scaffolding gunshi project

[kazupon]

Clear and concise description of the problem

cases

• gunshi simple CLI app
• gunshi sub-command app
• gunshi suc-command distribution package
• gunshi plugin distribution package

Suggested solution

We should use pkg-manager init or pkg-manager create style like npm create vite
ref : https://github.com/vitejs/vite/tree/main/packages/create-vite

Alternative

No response

Additional context

No response

Validations

• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.