Page Builder API for extension library elements... and a bit more #6080

Job	Run time
standard-packages (3.9, ubuntu-latest)	3m 58s
standard-packages (3.9, macos-13)	9m 7s
standard-packages (3.9, windows-latest)	7m 4s
standard-packages (3.10, ubuntu-latest)	3m 59s
standard-packages (3.10, macos-13)	7m 44s
standard-packages (3.10, windows-latest)	6m 54s
standard-packages (3.11, ubuntu-latest)	4m 3s
standard-packages (3.11, macos-13)	6m 42s
standard-packages (3.11, windows-latest)	6m 26s
standard-packages (3.12, ubuntu-latest)	4m 2s
standard-packages (3.12, macos-13)	6m 48s
standard-packages (3.12, windows-latest)	6m 24s
	1h 13m 11s

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