feat(push): stub for 'image push' command and Dialer interface for cluster connectors

cmd/uncloud/image/root.go

@@ -0,0 +1,18 @@
+package image
+
+import (
+	"github.com/spf13/cobra"
+)
+
+func NewRootCommand() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "image",
+		Short: "Manage Docker images in a cluster.",
+	}
+
+	cmd.AddCommand(
+		NewPushCommand(),
+	)
+
+	return cmd
+}