Skip the setup: deploy a Workers application in seconds

Introduces the "Deploy to Cloudflare" button, a feature that simplifies the deployment of Workers applications from Git repositories. This button automates repository cloning, provisioning of Cloudflare primitives (KV, D1, R2), configuration of Workers Builds (CI/CD), and the addition of preview URLs for pull requests. It aims to reduce the setup friction for developers sharing open-source Workers projects and for users self-hosting applications.