Tink CLI - create sample configuration

[thebsdbox]

Expected Behaviour

The cli provides the capability to generate sample output that an end user can easily take as a starting point to modifying and customise to their own needs.

In Kubernetes an end user can accomplish something similar with the --dry-run flag that will create output instead of applying or creating a configuration.

$ kubectl create deployment my-dep --image=nginx --dry-run=client -o json
{
  ...
}

An additional benefit is that this would always generate output that matches the specification of the structs in the tinkerbell server.

Current Behaviour

An end user has to take a large amount of json or yaml from docs and modify it to their own needs. We've seen issues where the docs haven't reflected changes to the yaml/json spec resulting in broken deployments.

Context

Simplify the UX for the end user

[jacobweinstock]

closed by #654