fix: Add requirements.txt at root level for HF Spaces

- HF Spaces looks for requirements.txt at root first
- Added packages.txt for system dependencies
- Ensures joblib is installed correctly

packages.txt

@@ -0,0 +1,2 @@
+# System packages for Hugging Face Spaces
+build-essential

requirements.txt

@@ -0,0 +1,33 @@
+# Core Dependencies (Install First)
+joblib>=1.3.0
+numpy>=1.24.0
+pandas>=2.0.0
+
+# ML and Data Science
+scikit-learn>=1.3.0
+xgboost>=1.7.0
+prophet>=1.1.0
+
+# Visualization and Explainability
+matplotlib>=3.7.0
+seaborn>=0.12.0
+plotly>=5.15.0
+shap>=0.42.0
+
+# Dashboard
+streamlit>=1.25.0
+
+# Data Processing
+pyyaml>=6.0
+python-dateutil>=2.8.0
+holidays>=0.25
+tqdm>=4.65.0
+
+# Generative AI and RAG
+torch>=2.0.0
+transformers>=4.30.0
+sentence-transformers>=2.2.0
+accelerate>=0.20.0
+langchain>=0.0.300
+langchain-community>=0.0.10
+faiss-cpu>=1.7.4