Windows: improve PowerShell support (#93) #267

Job	Run time
code-quality / Lint PHP files	18s
code-quality / PHPCS	17s
code-quality / Lint GitHub Actions workflows	5s
code-quality / Spell check	6s
code-quality / Lint Gherkin Feature files	12s
code-quality / PHPStan	20s
	1m 18s

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