fix: add setPagingEnabled to RCTScrollView

This prevents an error in the "Animated - Gratuitous App" section of RNTester.

Author: aleclarson

React/Views/ScrollView/RCTScrollView.m

@@ -667,6 +667,14 @@ - (type)getter                                            \
   return [_scrollView getter];                            \
 }
 
+- (void)setPagingEnabled:(__unused BOOL)pagingEnabled
+{
+  if (!pagingEnabled) {
+    // Paging is always enabled on macOS.
+    RCTLogError(@"[RCTScrollView pagingEnabled] cannot be false");
+  }
+}
+
 - (void)sendScrollEventWithName:(NSString *)eventName
                      scrollView:(NSScrollView *)scrollView
                        userData:(NSDictionary *)userData