Vercel Services: Run full stack on Vercel

What this post added

Introduces Vercel Services, a new capability allowing multiple frameworks (frontend, backend, etc.) to be deployed and managed within a single Vercel Project. This enables atomic deployments, shared preview deployments, and internal service communication via service bindings configured in `vercel.json`. The post details how services are declared, routed, and visualized in the Vercel UI, and how service bindings facilitate internal communication using environment variables. It also highlights framework-defined infrastructure, isolated compute for agents (Vercel Sandbox), WebSocket support, Vercel Connect for external service access, database and storage integrations, and background job processing (Queues, Workflow, Cron).