feat: use docs nuxt layer

[itsacoyote]

What :computer:

• Convert nuxt app to use zksync docs nuxt layer

Why :hand:

• Makes re-using components across projects easier
• theming is centralized

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit a0e4969):

https://community-cookbook-staging--pr3-use-nuxt-layer-wfg6nkaj.web.app

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