Add Model Descriptions

Add descriptions for new models available in the HuggingFace router to chat-ui's prod.yaml and dev.yaml.

Workflow

1. Fetch models from router

   WebFetch https://router.huggingface.co/v1/models
   

   Extract all model IDs from the response.

2. Read current configuration

   • Read chart/env/prod.yaml
   • Extract model IDs from the MODELS JSON array in envVars