Add compliant event handler as extra, for use in other languages #882

Job	Run time
samples (Release, ubuntu-24.04)	7m 12s
samples (Release, macos-latest)	3m 31s
samples (Release, windows-2022)	9m 7s
samples (Debug, windows-2022)	2m 25s
samples (Debug, macos-latest)	3m 41s
samples (Debug, ubuntu-24.04)	3m 27s
	29m 23s

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