docs: add trpc to examples (#38272)

## Documentation / Examples

- [x] Make sure the linting passes by running `pnpm lint`
- [x] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples)

Nice to have nextjs up to date always!

Co-authored-by: Balázs Orbán <18369201+balazsorban44@users.noreply.github.com>

examples/with-trpc/README.md

@@ -0,0 +1,13 @@
+# Next.js + tRPC
+
+## Next.js + tRPC + Prisma starter
+
+- https://github.com/trpc/examples-next-prisma-starter
+
+## Next.js + tRPC + Prisma starter with websockets
+
+- https://github.com/trpc/examples-next-prisma-starter-websockets
+
+## Next.js + tRPC minimal implementation
+
+- https://github.com/trpc/examples-next-minimal-starter