[stable32] feat: add dashboard pending signatures widget #6265

Job	Run time
changes	4s
matrix	10s
SQLite PHP 8.3 Nextcloud stable32 debug	3m 24s
SQLite PHP 8.3 Nextcloud stable32 coverage	3m 12s
phpunit-sqlite-summary	3s
finish-coverage	0s
	6m 53s

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