Add reusable phplinter-workflow #107

Job	Run time
Security checks	30s
Quality control	33s
Linter	1m 20s
Unit tests, PHP ${{ matrix.php-versions }}, ${{ matrix.operating-system }}	0s
Unit tests, PHP ${{ matrix.php-versions }}, ${{ matrix.operating-system }}	0s
Code coverage	0s
Cleanup artifacts	0s
	2m 23s

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