feat(nuxt): Add Nuxt SDK docs

[wobsoriano]

Important

🔎 Previews:

• https://clerk.com/docs/pr/1728/quickstarts/nuxt (Quickstart)
• https://clerk.com/docs/pr/1728/references/nuxt/overview (Overview)
• https://clerk.com/docs/pr/1728/references/nuxt/clerk-middleware (clerkMiddleware usage in Nuxt)
• https://clerk.com/docs/pr/1728/references/nuxt/read-session-data (Read session and user data)
• https://clerk.com/docs/pr/1728/references/nuxt/protecting-pages (Protecting pages)
• https://clerk.com/docs/pr/1728/quickstarts/overview#full-stack (Full stack entry)

Note:

I think it's best to review this PR after the Vue SDK PRs!

Explanation:

• Alongside the new Vue SDK we're launching, we're also launching an official Nuxt SDK. Nuxt is the fullstack framework for Vue.
• Nuxt SDK will be our fullstack SDK for Vue devs
• Here's the Nuxt SDK PR, merged and 0.0.1 released

This PR:

• Adds Nuxt SDK quickstart guide (quickstart repo here, 1:1 with the guide)
• Ads SDK References and code examples

Checklist

• I have clicked on "Files changed" and performed a thorough self-review
• I have added the "deploy-preview" label and added the preview link(s) to this PR description
• All existing checks pass

Resolves ECO-244

[github-actions]

Hey, here’s your docs preview: https://clerk.com/docs/pr/1728