chore: Add Nuxt Example

[frederikprijck]

Description

This PR adds a very basic, first version of a Nuxt application that leverages @auth0/auth0-server-js.

The nuxt integration is done using a module, containing:

• A plugin to create an instance of the ServerClient
• Stateless storage implementations (no stateful atm).
• 4 endpoints: login, callback, logout and profile
• A single composable use-auth that we can use to access the user in a component.

Just like with Next.js, for now, the middleware exists only in user-code.

This is a very basic implementation, and may require a bit more work, especially for the things marked with TODO (mostly regarding exposing instances using event.context)

Testing

From the root of the repository, run:

• npm install
• npm run dev -w example-nuxt-web

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not the default branch

[frederikprijck]

Closing this in favor of the Nuxt SDK we are working on.