UI updates to include "overlay kind"

internal/app/wwctl/overlay/show/root.go

@@ -6,19 +6,17 @@ import (
 
 var (
 	baseCmd = &cobra.Command{
-		Use:   "show [flags] <overlay name> <overlay file>",
+		Use:   "show [flags] <overlay kind> <overlay name> <overlay file>",
 		Short: "Show (cat) a file within a Warewulf Overlay",
 		Long: "This command will output the contents of a file within a given\n" +
 			"Warewulf overlay.",
 		RunE:    CobraRunE,
 		Aliases: []string{"cat"},
-		Args:    cobra.ExactArgs(2),
+		Args:    cobra.ExactArgs(3),
 	}
-	SystemOverlay bool
 )
 
 func init() {
-	baseCmd.PersistentFlags().BoolVarP(&SystemOverlay, "system", "s", false, "Show System Overlays as well")
 }
 
 // GetRootCommand returns the root cobra.Command for the application.