Add requirements.txt

requirements.txt

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+# Requirements for BIM5021 Labs
+# ================================
+
+# Core data processing
+pandas>=2.0.0
+numpy>=1.24.0
+
+# Visualization
+matplotlib>=3.7.0
+seaborn>=0.12.0
+
+# Machine Learning
+scikit-learn>=1.3.0
+
+# Association Rules Mining
+mlxtend>=0.22.0
+
+# Database connectivity
+psycopg2-binary>=2.9.0
+sqlalchemy>=2.0.0
+
+# Agentic BI (Chapter 8)
+# smolagents>=1.0.0
+# huggingface-hub>=0.20.0
+
+# Vector Search (Chapter 9)
+# chromadb>=0.4.0
+# sentence-transformers>=2.2.0
+
+# Optional: Streaming
+# confluent-kafka>=2.3.0
+# apache-flink>=1.17.0
+
+# Optional: dbt
+# dbt-core>=1.7.0
+# dbt-postgres>=1.7.0
+
+# Optional: Graph
+# neo4j>=5.0.0
+# networkx>=3.0