Unexport image commands

This patch deprecates exported image commands and moves the
implementation details to an unexported function.

Commands that are affected include:

- image.NewBuildCommand
- image.NewPullCommand
- image.NewPushCommand
- image.NewImagesCommand
- image.NewImageCommand
- image.NewHistoryCommand
- image.NewImportCommand
- image.NewLoadCommand
- image.NewRemoveCommand
- image.NewSaveCommand
- image.NewTagCommand
- image.NewPruneCommand

Signed-off-by: Alano Terblanche <18033717+Benehiko@users.noreply.github.com>

cli/command/image/build.go

@@ -81,7 +81,14 @@ func newBuildOptions() buildOptions {
 }
 
 // NewBuildCommand creates a new `docker build` command
-func NewBuildCommand(dockerCli command.Cli) *cobra.Command {
+//
+// Deprecated: Do not import commands directly. They will be removed in a future release.
+func NewBuildCommand(dockerCLI command.Cli) *cobra.Command {
+	return newBuildCommand(dockerCLI)
+}
+
+// newBuildCommand creates a new `docker build` command
+func newBuildCommand(dockerCli command.Cli) *cobra.Command {
 	options := newBuildOptions()
 
 	cmd := &cobra.Command{