Add initial `spack.yaml` and `config` #70

Job	Run time
Closed	0s
Comment	0s
CI / Set Defaults	1s
CI / Check Config Fields	9s
CI / Check spack.yaml	8s
CI / Get Version	3s
CI / Notifier	3s
CI / Deploy to Prerelease / Setup Deployment Environment	3s
CI / Deploy to Prerelease / Setup Spack Environment	1s
CI / Deploy to Prerelease / Deployment (Gadi Prerelease) / Deploy to Gadi Prerelease	3m 59s
CI / Deploy to Prerelease / Deployment (Gadi Prerelease) / Create Release	0s
CI / Deploy to Prerelease / Deployment (Gadi Prerelease) / Build DB Metadata Upload	0s
	4m 27s

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