feat: add event handlers registry component

lib/infra/registries.dart

@@ -0,0 +1,47 @@
+import 'package:buzz/buzz.dart';
+
+abstract class _IModuleBuzzRegistries<T> {
+  List<CommandRegistry> get commands;
+  List<UiEventRegistry> get uiEvents;
+  List<AppEventRegistry> get appEvents;
+}
+
+abstract class ModuleBuzzRegistries<T> extends _IModuleBuzzRegistries<T> {
+  @override
+  List<CommandRegistry> get commands => const [];
+
+  @override
+  List<AppEventRegistry> get appEvents => const [];
+
+  @override
+  List<UiEventRegistry> get uiEvents => const [];
+}
+
+abstract class UiEventRegistry extends EventHandlerRegistry<UIEvent> {
+  UiEventRegistry({
+    required Function(UIEvent) handler,
+  }) : super(handler: handler);
+}
+
+abstract class CommandRegistry extends EventHandlerRegistry<Command> {
+  CommandRegistry({
+    required Function(Command) handler,
+  }) : super(handler: handler);
+}
+
+abstract class AppEventRegistry extends EventHandlerRegistry<AppEvent> {
+  AppEventRegistry({
+    required Function(AppEvent) handler,
+  }) : super(handler: handler);
+}
+
+abstract class EventHandlerRegistry<T> {
+  EventHandlerRegistry({
+    required this.handler,
+  });
+
+  final Function(T) handler;
+
+  @override
+  String toString() => '$runtimeType type:$T';
+}