Explicitly enforce the number or arguments accepted by some wwctl subcommands. #1717

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/power/root.go

@@ -16,6 +16,7 @@ var (
 		Use:                   "power COMMAND [OPTIONS]",
 		Short:                 "Warewulf node power management",
 		Long:                  "This command controls the power state of nodes.",
+		Args:                  cobra.NoArgs,
 	}
 )