[ CR ] Gh 7032

[SethPaul]

Summary by CodeRabbit

• New Features
  • Example API surface, Example API Tester, Endpoint Explorer, and Example Demo UI; in-app API URL editor with per-branch/config overrides.
• Improvements
  • Containerized builds with health checks and non-root runtime; runtime-configurable TRPC/HTTP tools with code generation and copy-to-clipboard.
• CI/CD
  • Ephemeral preview environments, ECS image deploys, and Amplify preview deployments with PR comments and automated cleanup.
• Documentation
  • Expanded onboarding, Docker, environment, dependency, deployment, and testing guides.
• Tests
  • New Playwright E2E and extensive unit/integration test suites.