Add stop subcommand

Signed-off-by: Jan Dubois <jan.dubois@suse.com>

cmd/stop.go

@@ -0,0 +1,31 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(stopCmd)
+}
+
+var stopCmd = &cobra.Command{
+	Use:   "stop",
+	Short: "Stop a machine.",
+	Long:  `Stop a machine.`,
+	RunE:  stopCommand,
+}
+
+func stopCommand(cmd *cobra.Command, args []string) error {
+	api := newAPI()
+	defer api.Close()
+
+	host, err := api.Load(machineName)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("Powering down machine now...")
+	return host.Stop()
+}