kudo get cmd help

[kensipe]

What this PR does / why we need it:

Update to provide proper help messaging for the get command at the root level and at the get level

go run cmd/kubectl-kudo/main.go -h
KUDO CLI and future sub-commands can be used to manipulate, inspect and troubleshoot KUDO-specific CRDs
and serves as an API aggregation layer.

Usage:
  kubectl-kudo [command]

Examples:
...
  # Get instances
  kubectl kudo get instances [flags]

Available Commands:
  diagnostics collect diagnostics
  get         Gets list of installed components (instances, operators, operatorversions or all).


Flags:
  -h, --help                  help for kubectl-kudo
      --home string           Location of your KUDO config. (default "/Users/kensipe/.kudo")
...
Use "kubectl-kudo [command] --help" for more information about a command.

and

go run cmd/kubectl-kudo/main.go get -h
Gets list of installed components (instances, operators, operatorversions or all).

Usage:
  kubectl-kudo get <instances|operators|operatorversions|all> [flags]

Examples:
  # Get all available instances
  kubectl kudo get instances

  # Get all available operators
  kubectl kudo get operators

  # Get all available operatorversions
  kubectl kudo get operatorversions

  # Get all installed components
  kubectl kudo get all

  # Get all installed components as yaml
  kubectl kudo get all -o yaml


Flags:
  -h, --help            help for get
  -o, --output string   Output format. One of: json|yaml

Global Flags:
      --home string           Location of your KUDO config. (default "/Users/kensipe/.kudo")
      --kubeconfig string     Path to your Kubernetes configuration file. (default "/Users/kensipe/.kube/config")
  -n, --namespace string      Target namespace for the object. (default "default")
      --request-timeout int   Request timeout value, in seconds.  Defaults to 0 (unlimited)
  -v, --v 0                   Log level for V logs
      --validate-install      Validate KUDO installation before running. (default true)

Fixes #1673

[ANeumann82]

Thanks, that lgtm!

[ANeumann82]

This is marked as a warning in my Goland/IntelliJ - Looks like we don't have that as a linting rule. I'm ok with either, tbh.