feat(modules): add hello toy module as engine smoke test

cmd/archduino/main.go

@@ -11,6 +11,7 @@ import (
 	"github.com/MDietermann/ArduinoArchSetup/internal/config"
 	"github.com/MDietermann/ArduinoArchSetup/internal/engine"
 	"github.com/MDietermann/ArduinoArchSetup/internal/module"
+	"github.com/MDietermann/ArduinoArchSetup/internal/modules/hello"
 	"github.com/MDietermann/ArduinoArchSetup/internal/privilege"
 	"github.com/MDietermann/ArduinoArchSetup/internal/state"
 )
@@ -21,6 +22,12 @@ var version = "dev"
 // real modules into it via init(). Task 12 registers the hello toy module.
 var Registry = module.NewRegistry()
 
+func init() {
+	if err := Registry.Register(hello.Module{}); err != nil {
+		panic(err)
+	}
+}
+
 func main() {
 	root := &cobra.Command{
 		Use:           "archduino",