Provide Home Manager module for Determinate Nix #470

Job	Run time
test-modules (macos-latest)	2m 2s
checks	50s
verify-outputs (aarch64-linux, UbuntuLatest32Cores128GArm)	26s
verify-outputs (aarch64-darwin, macos-latest-xlarge)	1m 25s
verify-outputs (x86_64-linux, UbuntuLatest32Cores128G)	41s
test-modules (ubuntu-latest)	1m 8s
success	2s
publish	0s
	6m 34s

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