Page Builder API for extension library elements... and a bit more #6089

Job	Run time
standard-packages (3.9, ubuntu-latest)	3m 58s
standard-packages (3.9, macos-13)	10m 30s
standard-packages (3.9, windows-latest)	7m 23s
standard-packages (3.10, ubuntu-latest)	4m 11s
standard-packages (3.10, macos-13)	8m 28s
standard-packages (3.10, windows-latest)	6m 46s
standard-packages (3.11, ubuntu-latest)	3m 51s
standard-packages (3.11, macos-13)	7m 3s
standard-packages (3.11, windows-latest)	6m 21s
standard-packages (3.12, ubuntu-latest)	4m 6s
standard-packages (3.12, macos-13)	5m 42s
standard-packages (3.12, windows-latest)	6m 7s
	1h 14m 26s

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