Next.js example application

[lukecarr]

We should include a reference Next.js application to demonstrate how crls works in the real world.

The example should probably use Prisma because of it's popularity & widespread use with Next.js, and some authentication library (e.g. Clerk, Magic).

The app should be placed in a directory named examples/nextjs-prisma-clerk (or whatever libraries are chosen), and use PNPM as the package manager (to align with the library).