Added Big-4 project to community gallery

[harshit078]

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Big 4 Financial Risk Analysis App

Description of Changes

This PR introduces a new Preswald app for analyzing the "Big-4-financial-risk-insights-2020-2025" dataset from Kaggle. The app provides comprehensive visualization and analysis capabilities for exploring financial risk metrics across the Big 4 accounting firms.

Added

• Uses Preswald's built-in components for interactive visualization
• Implements error handling for robust operation with various dataset structures
• Dynamically adapts visualizations based on available columns
• Provides clear user feedback throughout the analysis process
• Company selection, year filtering, and risk threshold controls
• Time series analysis of risk trends
• Distribution analysis of financial metrics
• Correlation analysis between metrics and risk scores
• Heatmaps for identifying relationships between variables

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• New example
• Test improvement

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have run my code against examples and ensured no errors
• Any dependent changes have been merged and published in downstream modules