Add `atmos docs <component>` command #2266

Job	Run time
Build	2m 10s
Acceptance Tests	1m 8s
Docker Lint	23s
[k3s] demo-helmfile	38s
[lint] demo-context	8s
[localstack] demo-localstack	2m 25s
[mock] demo-atlantis	8s
[mock] demo-component-versions	10s
[mock] demo-context	11s
[mock] demo-vendoring	12s
release	0s
	7m 33s

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