Rewrite to use saml2v5 #156

Job	Run time
PHP-Linter (8.3) / linter	15s
Linter / yaml-linter	4s
PHP-Linter (8.4) / linter	10s
PHP-Linter (8.1) / linter	10s
Linter / json-linter	27s
PHP-Linter (8.2) / linter	17s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.1, ubuntu-latest	17s
Unit tests, PHP 8.2, ubuntu-latest	19s
Unit tests, PHP 8.3, ubuntu-latest	16s
Unit tests, PHP 8.4, ubuntu-latest	18s
Unit tests, PHP 8.1, windows-latest	50s
Unit tests, PHP 8.2, windows-latest	50s
Unit tests, PHP 8.3, windows-latest	49s
Unit tests, PHP 8.4, windows-latest	46s
Code coverage	-1s
Quality control	-1s
Security checks	-1s
Cleanup artifacts	-1s
	5m 44s

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