Add bunching analysis files and readme

[vahid-ahmadi]

Fixes #12

[vahid-ahmadi]

Please ignore the elasticity parameters for now, I still need to calibrate those values.

[Copilot]

Pull Request Overview

This PR adds comprehensive bunching analysis capabilities to the repository by introducing a complete 5-step VAT bunching analysis pipeline for studying firm responses to VAT registration thresholds. The implementation includes advanced probabilistic mapping, policy simulation, and revenue analysis features.

Key changes:

• Complete bunching analysis implementation with Steps 1-5 pipeline
• Advanced probabilistic mapping for micro-level firm behavior analysis
• Comprehensive documentation for both synthetic data generation and bunching analysis methodology

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 5 comments.

File	Description
analysis/bunching_analysis.py	Complete 5-step VAT bunching analysis implementation with advanced mapping algorithms
analysis/README_synthetic_data.md	Comprehensive documentation for synthetic UK business data generation methodology
analysis/README_bunching_analysis.md	Detailed documentation of VAT bunching analysis theory and implementation
analysis/README.md	Removed old synthetic data documentation (replaced by new dedicated file)

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[Copilot]

Suppressing all warnings globally is not recommended as it can hide important issues. Consider using more specific warning filters or contextual warning suppression for known harmless warnings.

Suggested change

warnings.filterwarnings('ignore')

[Copilot]

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