refactor: consolidate PHP testing actions with Laravel detection

Merge php-tests, php-laravel-phpunit, and php-composer into single php-tests action:

Consolidation:
- Merge three PHP actions into one with framework auto-detection
- Add framework input (auto/laravel/generic) with artisan file detection
- Inline PHP version detection from multiple sources
- Inline Composer setup, caching, and dependency installation
- Add conditional Laravel-specific setup steps

Features:
- Auto-detect Laravel via artisan file presence
- PHP version detection from .tool-versions, Dockerfile, composer.json, etc.
- Composer dependency management with retry logic and caching
- Laravel setup: .env copy, key generation, permissions, SQLite database
- Smart test execution: composer test for Laravel, direct PHPUnit for generic

Outputs:
- framework: Detected framework (laravel/generic)
- php-version, composer-version, cache-hit: Setup metadata
- test-status, tests-run, tests-passed: Test results

Deleted:
- php-laravel-phpunit/: Laravel-specific testing action
- php-composer/: Composer dependency management action
- Related test files and custom validators

Updated:
- CLAUDE.md: 26 → 24 actions
- generate_listing.cjs: Remove php-laravel-phpunit, php-composer
- validate-inputs: Remove php-laravel-phpunit custom validator

Result: 3 actions → 1 action, maintained all functionality with simpler interface.

php-tests/rules.yml

@@ -1,37 +1,49 @@
+---
 # Validation rules for php-tests action
 # Generated by update-validators.py v1.0.0 - DO NOT EDIT MANUALLY
 # Schema version: 1.0
-# Coverage: 100% (3/3 inputs)
+# Coverage: 78% (7/9 inputs)
 #
 # This file defines validation rules for the php-tests GitHub Action.
 # Rules are automatically applied by validate-inputs action when this
 # action is used.
 #
+
 schema_version: '1.0'
 action: php-tests
-description: Run PHPUnit tests on the repository
+description: Run PHPUnit tests with optional Laravel setup and Composer dependency management
 generator_version: 1.0.0
 required_inputs: []
 optional_inputs:
+  - composer-args
+  - coverage
   - email
+  - extensions
+  - framework
+  - max-retries
+  - php-version
   - token
   - username
 conventions:
+  coverage: coverage_driver
   email: email
+  framework: boolean
+  max-retries: numeric_range_1_10
+  php-version: semantic_version
   token: github_token
   username: username
 overrides: {}
 statistics:
-  total_inputs: 3
-  validated_inputs: 3
+  total_inputs: 9
+  validated_inputs: 7
   skipped_inputs: 0
-  coverage_percentage: 100
-validation_coverage: 100
+  coverage_percentage: 78
+validation_coverage: 78
 auto_detected: true
-manual_review_required: false
+manual_review_required: true
 quality_indicators:
   has_required_inputs: false
   has_token_validation: true
-  has_version_validation: false
+  has_version_validation: true
   has_file_validation: false
   has_security_validation: true