Add common utilities #96

Job	Run time
Build and test (Autoconf) (2.71, ubuntu-latest)	2m 1s
Build and test (Autoconf) (2.72, ubuntu-24.04-arm)	33s
Build and test (Autoconf) (2.71, ubuntu-24.04-arm)	3m 28s
Build and test (Devcontainer) (ubuntu-latest)	51s
Build and test (Autoconf) (2.72, ubuntu-latest)	3m 38s
Build and test (Devcontainer) (ubuntu-24.04-arm)	52s
	11m 23s

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