Adopt SSP coding-style #640

Job	Run time
PHP-Linter (8.3) / linter	11s
PHP-Linter (8.5) / linter	10s
PHP-Linter (8.2) / linter	12s
PHP-Linter (8.4) / linter	10s
Linter / style-linter	0s
Linter / yaml-linter	4s
Linter / ecmascript-linter	18s
Linter / json-linter	27s
Unit tests, PHP 8.2, ubuntu-latest	22s
Unit tests, PHP 8.3, ubuntu-latest	23s
Unit tests, PHP 8.2, windows-latest	56s
Unit tests, PHP 8.3, windows-latest	59s
Unit tests, PHP 8.5, windows-latest	58s
Unit tests, PHP 8.5, ubuntu-latest	23s
Unit tests, PHP 8.4, windows-latest	1m 3s
Unit tests, PHP 8.4, ubuntu-latest	21s
Quality control	33s
Code coverage	6s
Security checks	21s
Cleanup artifacts	6s
	8m 3s

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