chore: add cmd

cmd/orbis/main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+func main() {
+	if err := newRoot().Execute(); err != nil {
+		fmt.Printf("%s\n", err)
+		os.Exit(1)
+	}
+}