feat: move native communication to FFI (#1457)

ui/flutter/ios/Runner/GopeedTaskEventForwarder.h

@@ -0,0 +1,16 @@
+#import <Flutter/Flutter.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface GopeedTaskEventForwarder : NSObject
+
+- (instancetype)initWithChannel:(FlutterMethodChannel *)channel NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+FOUNDATION_EXPORT void GopeedSubscribeTaskEventsWithForwarder(
+    int64_t mask,
+    GopeedTaskEventForwarder * _Nullable listener);
+
+NS_ASSUME_NONNULL_END