Haskell library and example

`nix flake update` #124

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Run time

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Job	Run time
linux (8.6.5, 3.6)	13m 3s
linux (8.8.4, 3.6)	13m 24s
linux (8.10.4, 3.6)	12m 5s
linux (9.0.2, 3.6)	11m 42s
linux (9.2.4, 3.6)	13m 0s
	1h 3m 14s