feat(api): implement product caching mechanism

- Add NODE_ENV=production to .env for environment configuration
- Enhance product API route with JSON cache manager for local storage and retrieval
- Introduce cache-only mode and detailed logging for better performance and offline support
- Update UI to display cache status and storage statistics

pnpm-workspace.yaml

@@ -1,4 +1,5 @@
 onlyBuiltDependencies:
   - '@prisma/client'
   - '@prisma/engines'
+  - leveldown
   - prisma