CyclomaticComplexityRule and General Updates

[Orrison]

Update composer deps, fix some README information, add CyclomaticComplexityRule closing #37, and fix a lot of test file namespaces

[Copilot]

Pull request overview

This pull request adds a new CyclomaticComplexityRule to detect methods with high cyclomatic complexity, updates composer dependencies, fixes README information, and refactors test files to follow PSR-4 standards by splitting multi-class fixture files into separate files with corrected namespaces.

• Adds comprehensive CyclomaticComplexityRule implementation with configurable thresholds and reporting options
• Updates all composer dependencies to latest versions
• Refactors test fixtures across multiple rules to follow PSR-4 (one class per file)
• Corrects test namespaces and updates test expectations after fixture reorganization

Reviewed changes

Copilot reviewed 74 out of 75 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/Rules/CyclomaticComplexity/CyclomaticComplexityRule.php	New rule implementation calculating cyclomatic complexity for methods and classes
src/Rules/CyclomaticComplexity/Config.php	Configuration class for complexity thresholds and reporting options
config/extension.neon	Adds parameter schema and service registration for CyclomaticComplexity rule
docs/CyclomaticComplexity.md	Comprehensive documentation for the new rule with examples
tests/Rules/CyclomaticComplexity/*	Test suite with 4 test scenarios covering different configurations
tests/Rules/TooManyMethods/Fixture/*	Splits monolithic ExampleClass.php into separate PSR-4 compliant files
tests/Rules/ShortClassName/Fixture/*	Splits combined fixture files into individual class files
tests/Rules/LongClassName/Fixture/*	Splits interface/trait/enum into separate files
tests/Rules/ConstructorWithNameAsEnclosingClass/Fixture/*	Separates classes, traits, and interfaces into individual files
tests/Rules/ConstantNamingConventions/Fixture/*	Splits interface and enum into separate files
tests/Rules/BooleanArgumentFlag/Fixture/*	Reorganizes fixtures into separate files per class
tests/Rules/BooleanArgumentFlag/config/*	Updates ignored class namespaces to match corrected test namespaces
CLAUDE.md	Adds PSR-4 fixture file standards documentation
README.md	Adds CyclomaticComplexity to rules table, comments out contributing section
composer.json	Removes PHP_CS_FIXER_IGNORE_ENV export from cs-fix script
composer.lock	Updates all dependency versions to latest compatible releases