Zenn CLI π How to use Command π ζ°γγθ¨δΊγδ½ζγγ $ npx zenn new:article π ζ°γγζ¬γδ½ζγγ $ npx zenn new:book π ζη¨Ώγγγ¬γγ₯γΌγγ $ npx zenn preview