Smoke

Add release manifest helper #45

Job	Run time
flatten / windows-latest / hardlink	1m 5s
flatten / ubuntu-latest / hardlink	19s
ubuntu-latest / hardlink	29s
ubuntu-latest / copy	31s
windows-latest / copy	50s
windows-latest / symlink	41s
windows-latest / hardlink	42s
ubuntu-latest / symlink	27s
	5m 4s

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