Initial commit: sales analysis template

Co-authored-by: Cursor <cursoragent@cursor.com>

requirements.txt

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+# Python dependencies for Sales Analysis Template
+# Install with: pip install -r requirements.txt
+
+# Core data analysis
+pandas>=2.0.0
+numpy>=1.24.0
+
+# Visualization
+matplotlib>=3.7.0
+seaborn>=0.12.0
+
+# Export utilities (optional - uncomment if needed)
+# openpyxl>=3.1.0  # For Excel export (export_utils.py)
+
+# Interactive visualizations (optional - uncomment if needed)
+# plotly>=5.17.0  # For interactive charts (analysis_utils.py)
+
+# Report generation (optional - uncomment if needed)
+# reportlab>=4.0.0  # For PDF reports (report_generator.py)
+
+# Statistical analysis (optional - uncomment if needed)
+# scipy>=1.10.0  # For statistical analysis, product lifecycle (statistical_utils.py)
+
+# Testing (optional - uncomment if needed)
+# pytest>=7.4.0  # For unit tests
+
+# Advanced analysis (optional - uncomment if needed)
+# pmdarima>=2.0.0  # For time series forecasting
+# mlxtend>=0.22.0  # For market basket analysis
+# scikit-learn>=1.3.0  # For machine learning analyses