Implement exclusion and breaking change classification (Task 4.3)

[jbrinkman]

This PR implements the exclusion and breaking change classification functionality for the DotNetApiDiff tool (Task 4.3).

Changes

• Created IChangeClassifier interface for classifying API changes
• Implemented ChangeClassifier class with support for:
  • Breaking change classification based on configuration
  • Exclusion pattern matching with wildcard support
  • Severity level assignment
• Integrated the classifier into the ApiComparer workflow
• Added comprehensive unit tests
• Updated existing tests to accommodate the new dependency

Requirements Addressed

• 3.1: Support for excluding types and members from comparison
• 7.1: Classification of breaking vs. non-breaking changes
• 7.2: Support for configurable breaking change rules
• 7.3: Support for exclusion patterns with wildcards
• 7.4: Support for severity levels

All tests are passing.

[Copilot]

Pull Request Overview

This PR implements the exclusion and breaking change classification functionality for the DotNetApiDiff tool (Task 4.3). It introduces a new IChangeClassifier interface and its implementation to classify API changes as breaking, non-breaking, or excluded based on configuration rules, while integrating this classifier into the existing ApiComparer workflow.

Key changes implemented:

• Created IChangeClassifier interface and ChangeClassifier implementation with support for breaking change classification and exclusion pattern matching with wildcards
• Integrated the classifier into the ApiComparer workflow to classify changes before adding them to results
• Added comprehensive unit tests for the new functionality and updated existing tests to accommodate the new dependency

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/DotNetApiDiff/Interfaces/IChangeClassifier.cs	Defines interface for classifying API changes and checking exclusions
src/DotNetApiDiff/ApiExtraction/ChangeClassifier.cs	Implements change classification logic with breaking change rules and exclusion patterns
src/DotNetApiDiff/ApiExtraction/ApiComparer.cs	Integrates change classifier into the comparison workflow
src/DotNetApiDiff/Program.cs	Registers ChangeClassifier service in dependency injection container
tests/DotNetApiDiff.Tests/ApiExtraction/ChangeClassifierTests.cs	Comprehensive unit tests for change classification functionality
tests/DotNetApiDiff.Tests/ApiExtraction/ApiComparerTests.cs	Updates tests to mock the new IChangeClassifier dependency
tests/DotNetApiDiff.Tests/ApiExtraction/ApiComparerWithMappingTests.cs	Updates tests to mock the new IChangeClassifier dependency
tests/DotNetApiDiff.Tests/ApiExtraction/ApiComparerManualTests.cs	Updates manual tests to mock the new IChangeClassifier dependency