Sort ctr commands alphabetically

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

cmd/ctr/main.go

@@ -58,32 +58,32 @@ containerd CLI
 		},
 	}
 	app.Commands = append([]cli.Command{
-		imageCommand,
+		applyCommand,
-		pullCommand,
+		attachCommand,
+		checkpointCommand,
+		containersCommand,
+		contentCommand,
+		deleteCommand,
+		eventsCommand,
+		execCommand,
 		fetchCommand,
 		fetchObjectCommand,
-		pushCommand,
+		imageCommand,
-		pushObjectCommand,
-		containersCommand,
-		checkpointCommand,
-		runCommand,
-		attachCommand,
-		deleteCommand,
-		namespacesCommand,
-		eventsCommand,
-		taskListCommand,
 		infoCommand,
 		killCommand,
-		pprofCommand,
+		namespacesCommand,
-		execCommand,
 		pauseCommand,
-		resumeCommand,
+		pprofCommand,
-		snapshotCommand,
-		versionCommand,
 		psCommand,
-		applyCommand,
+		pullCommand,
+		pushCommand,
+		pushObjectCommand,
+		resumeCommand,
 		rootfsCommand,
-		contentCommand,
+		runCommand,
+		snapshotCommand,
+		taskListCommand,
+		versionCommand,
 	}, extraCmds...)
 	app.Before = func(context *cli.Context) error {
 		if context.GlobalBool("debug") {