Migrate to singbox

lib/domain/singbox/singbox_facade.dart

@@ -0,0 +1,16 @@
+import 'package:fpdart/fpdart.dart';
+import 'package:hiddify/domain/core_service_failure.dart';
+
+abstract interface class SingboxFacade {
+  TaskEither<CoreServiceFailure, Unit> setup();
+
+  TaskEither<CoreServiceFailure, Unit> parseConfig(String path);
+
+  TaskEither<CoreServiceFailure, Unit> changeConfig(String fileName);
+
+  TaskEither<CoreServiceFailure, Unit> start();
+
+  TaskEither<CoreServiceFailure, Unit> stop();
+
+  Stream<Either<CoreServiceFailure, String>> watchLogs();
+}