feat: use @matterlabs/docs-nuxt-layer npm pkg

[itsacoyote]

Description

Switch to use docs-nuxt-template as an npm package.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit cbdec4a):

https://zksync-sdk-docs-staging--pr59-nuxt-layer-pkg-uz1asne7.web.app

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[github-actions[bot]]

:tada: This PR is included in version 1.5.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: