Added Open Source LLM Support via GROQ

[pulkitporwal]

Summary

This pull request refactors the API integration to dynamically select between OpenAI and Groq based on the provided API key. This improves flexibility and ensures seamless compatibility with different providers.

Changes

• Refactored ai.go to automatically select the best LLM based on the provided API key.
• Updated config.prod.yaml to include new keys for improved dynamic model selection.
• Modified the configuration handling to properly integrate different LLMs without hardcoded values.

Testing

• Verified automatic API selection and correct model assignment.
• Ensured all functionalities (prompt execution, response handling, error reporting) work as expected.

Additional Notes

This change requires the correct API key format to ensure proper provider detection and model selection.