Modernizes testing infrastructure with dedicated Cloudflare Workers test pool:
- Replaces Nuxt Test Utils with @cloudflare/vitest-pool-workers
- Adds structured test organization for API endpoints
- Introduces comprehensive testing patterns and examples
- Implements schema-based test data generation with zod-mock
- Enhances test utilities with proper CF Workers environment
The new testing setup provides better isolation, more realistic worker runtime environment, and improved test data management through structured schemas and generators.
