feat: initialize ingest-api with Koa and telemetry handling

- Create ingest-api with Koa framework for handling device telemetry.
- Implement telemetry ingestion with MongoDB, Redis, and PostgreSQL.
- Add API endpoints for telemetry and health checks.
- Set up testing with Vitest for unit and end-to-end tests.
- Configure Prettier and ESLint for code formatting and linting.
- Create Docker Compose setup for PostgreSQL, MongoDB, and Redis services.
- Establish contracts package for shared Zod schemas and TypeScript types.
- Implement React frontend with device status and greeting functionalities.
- Add VS Code setup documentation for onboarding developers.

.env.example

@@ -0,0 +1,7 @@
+DATABASE_URL=postgres://app:app@127.0.0.1:5432/app
+MONGO_URL=mongodb://127.0.0.1:27017/app
+REDIS_URL=redis://127.0.0.1:6379
+CRUD_PORT=3000
+INGEST_PORT=3001
+VITE_API_BASE_URL=http://127.0.0.1:3000
+VITE_INGEST_BASE_URL=http://127.0.0.1:3001