ctr: move tasks, run to commands package

Signed-off-by: Jess Valarezo <valarezo.jessica@gmail.com>

cmd/ctr/commands/tasks/tasks.go

@@ -0,0 +1,30 @@
+package tasks
+
+import (
+	gocontext "context"
+
+	"github.com/urfave/cli"
+)
+
+type resizer interface {
+	Resize(ctx gocontext.Context, w, h uint32) error
+}
+
+// Command is the cli command for managing tasks
+var Command = cli.Command{
+	Name:    "tasks",
+	Usage:   "manage tasks",
+	Aliases: []string{"t"},
+	Subcommands: []cli.Command{
+		attachCommand,
+		checkpointCommand,
+		deleteCommand,
+		execCommand,
+		listCommand,
+		killCommand,
+		pauseCommand,
+		psCommand,
+		resumeCommand,
+		startCommand,
+	},
+}