Support Vercel Analytics

[konhi]

Description

Vercel Analytics is well-integrated with Next.js. We can easily integrate it to this starter, by:

1. installing @vercel/analytics
2. adding a config that enables analytics, e.g. enableVercelAnalytics: boolean
3. adding {enableVercelAnalytics && <Analytics />} to _app.tsx

This is better than already existing solutions, because it doesn't require creating additional accounts. Their free plan is also generic, in comparison to Fathom, which doesn't have a free plan.

Let me know if you see value in that! ☺️