Add nix installation #245

Job	Run time
build (linux/amd64, ubuntu-24.04, jammy, gcc, 12)	1s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 16)	1m 6s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 18)	1m 5s
build (linux/amd64, ubuntu-24.04, noble, clang, 16)	1m 8s
build (linux/amd64, ubuntu-24.04, noble, clang, 20)	1m 9s
build (linux/amd64, ubuntu-24.04, noble, gcc, 14)	1m 11s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 20)	1s
build (linux/amd64, ubuntu-24.04, noble, clang, 17)	1s
build (linux/amd64, ubuntu-24.04, noble, clang, 19)	1s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 19)	1s
build (linux/arm64, ubuntu-24.04-arm, noble, gcc, 14)	1s
build (linux/arm64, ubuntu-24.04-arm, noble, gcc, 13)	1m 6s
build (linux/amd64, ubuntu-24.04, noble, clang, 18)	1s
build (linux/amd64, ubuntu-24.04, noble, gcc, 13)	1s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 17)	1s
build (linux/arm64, ubuntu-24.04-arm, jammy, gcc, 12)	1s
merge	1s
	6m 56s

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