Switch to zksync docs nuxt template

[itsacoyote]

What :computer:

• Use the zksync docs nuxt template in the docs project

Why :hand:

• This will help with the consistency of theming and reusable components to be shared across projects.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit c6782b6):

https://zksync-docs-staging-5eb09--pr60-switch-to-nuxt-layer-gkrcsey6.web.app

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