Add class-based routing framework for Cloudflare Workers and Durable Objects
  built on itty-router with automatic error handling, CORS support, and
  comprehensive TypeScript types.

  Features:
  - WorkerRouter and DurableObjectRouter with fluent API
  - RouteHandler base classes for organizing route logic
  - Automatic JSON error responses with HttpError support
  - Pre-configured CORS headers
  - Full TypeScript support with generics

  Testing:
  - 107 tests (99 unit + 8 integration) with 95.98% coverage
  - Unit tests for all core functionality
  - Integration smoke tests with Miniflare
  - Automated CI/CD ready

  Documentation:
  - TypeDoc-generated API docs with comprehensive JSDoc
  - Auto-deploy to GitHub Pages on push
  - README with quick start examples
  - CONTRIBUTING.md with development guidelines