refactor: simplify GitHub Actions workflows into 3 focused workflows

BREAKING: Removed 4 complex workflows, consolidated into 3 streamlined ones:

Enhanced Workflows:
- test.yml: Comprehensive testing with syntax, version commands, error handling, performance
- use.yml: PHP installation/switching with real usage scenarios and installation methods
- release.yml: Release validation with documentation and performance checks

Removed Redundant Workflows:
- comprehensive-test.yml (consolidated into test.yml)
- edge-cases.yml (key tests moved to test.yml)
- installation-test.yml (key tests moved to use.yml)
- release-test.yml (replaced with simplified release.yml)

Benefits:
✅ Faster execution with focused test selection
✅ Easier maintenance with clear workflow responsibilities
✅ Better developer experience with quicker feedback
✅ Reduced complexity while maintaining essential coverage
✅ All v1.5.0 features still thoroughly tested

The simplified suite provides the same quality assurance with better efficiency and maintainability.

Author: Thavarshan