Feat/evaluation

[agfianf]

🎨 Enhanced Color Correction with Improved Documentation and Evaluation

📝 Description

This PR enhances the color correction functionality and improves documentation clarity with the following changes:

• Added comprehensive "How it works" section with visual explanation
• Enhanced color correction service with improved patch comparison
• Implemented detailed evaluation metrics for color correction quality
• Updated README with polynomial correction model details
• Restructured documentation headers for better readability
• Added sample debug output visualization

🔍 Key Changes

• New evaluation method calc_color_diff_patches() for measuring correction quality
• Support for multiple correction models: polynomial, least squares, affine_reg, linear_reg
• Enhanced debug visualization with before/after comparisons
• Improved code organization in color correction service
• Added detailed usage examples with evaluation results

📊 Technical Details

• Polynomial correction model now supports configurable degrees
• Added color difference calculation using CIE 2000 method
• Implemented reference patch management functionality
• Enhanced debug output with grid visualization