feat: implement async mode for instance/provide annotations

examples/postly/lib/di/app_module.dart

@@ -24,6 +24,14 @@ abstract class AppModule extends Module {
   @named('baseUrl')
   String baseUrl() => "https://google.com";
 
+  @provide()
+  @named('Delay1')
+  Future<int> delay1() => Future.value(1000);
+
+  @provide()
+  @named('Size1')
+  Future<int> size1() async => 10;
+
   @provide()
   @singleton()
   @named('dio')