Initial version of the Orchard orchestration system (#3)

* Initial version of the Orchard orchestration system

* Update README.md

Co-authored-by: Fedor Korotkov <fedor.korotkov@gmail.com>

Co-authored-by: Fedor Korotkov <fedor.korotkov@gmail.com>

internal/command/controller/controller.go

@@ -0,0 +1,29 @@
+package controller
+
+import (
+	"github.com/cirruslabs/orchard/internal/orchardhome"
+	"github.com/spf13/cobra"
+	"log"
+	"path/filepath"
+)
+
+var dataDir string
+
+func NewCommand() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "controller",
+		Short: "Initialize and run a controller on the local machine",
+	}
+
+	command.AddCommand(newRunCommand())
+
+	orchardHome, err := orchardhome.Path()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	command.PersistentFlags().StringVar(&dataDir, "data-dir", filepath.Join(orchardHome, "controller"),
+		"path to the data directory")
+
+	return command
+}