fix: correct snapshot_download usage and add better error handling

feat: use snapshot_download for efficient HF Space storage

feat: use ChromaDB remote storage for HF embeddings

feat: improve HuggingFace dataset loading with better error handling

feat: add debug logging for embeddings loading

fix: Update path handling for both local and HF environments

Chatbot working and well! Updated system prompt, sources and explanations in chat

Initial commit for cleanstart2