feat: add direct Groq API support and AI settings controls}
- Add groq-sdk dependency for direct Groq API calls without proxy
- Add comprehensive Redis command generation system prompt with
support for all Redis data types, RediSearch, Pub/Sub, and Cluster
- Support two AI modes: direct Groq API (own key) and network proxy
- Add aiEnabled and aiUseOwnKey configuration options persisted to
p3xrs.json
- Add validate-groq-api-key endpoint to verify API key validity
- Expose aiEnabled and aiUseOwnKey settings in socket.io init payload
- Bump version to v2026.4.309