Migrate DOM-classes to PHP 8.4's new DOM-API #1411

Job	Run time
Linter / yaml-linter	7s
Linter / json-linter	24s
PHP-Linter (8.5) / linter	11s
Linter / ecmascript-linter	-1s
Linter / style-linter	-1s
Unit tests, PHP 8.5, ubuntu-latest	21s
Unit tests, PHP 8.5, windows-latest	1m 10s
Code coverage	10s
Security checks	15s
Quality control	42s
Cleanup artifacts	3s
	3m 21s

Provide feedback