Refactor PHP workflow for improved directory structure #216

Job	Run time
PHP Syntax Linting	8s
Validate dependencies file	5s
Scan Dependencies Vulnerabilities	4s
php-lint-quality	11s
PHP Unit Tests (30)	32s
PHP Unit Tests (28)	26s
PHP Unit Tests (29)	27s
PHP Version Compatibility (8.2)	11s
PHP Version Compatibility (8.1)	8s
PHP Version Compatibility (8.3)	10s
	2m 22s

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