feat: scaffold dirs with a noop miro init command

cmd/root.go

@@ -0,0 +1,19 @@
+package cmd
+
+import "miro/internal/output"
+
+// Run parses top-level CLI args and returns a process exit code.
+func Run(args []string) int {
+	if len(args) == 0 {
+		output.Println("unknown command")
+		return 1
+	}
+
+	switch args[0] {
+	case "init":
+		return runInit(args[1:])
+	default:
+		output.Printf("unknown command: %s\n", args[0])
+		return 1
+	}
+}