Improving Cloudflare Workers and D1 developer experience with Prisma ORM

Introduces native support for Cloudflare D1 databases within Cloudflare Workers using Prisma ORM. Details the setup process including `wrangler d1 create`, `wrangler.toml` configuration, installing Prisma dependencies (`@prisma/client`, `@prisma/adapter-d1`), initializing Prisma with `npx prisma init --datasource-provider sqlite`, enabling the `driverAdapters` preview feature, defining a `Visit` model, generating and applying migrations using `wrangler d1 migrations create` and `prisma migrate diff`, and re-generating the Prisma Client. Provides example code for a Worker to count and create visitor records using the Prisma Client.