fix: ensure PausedInDebuggerOverlay has message set before presenting (#2594)

## Summary:

RCTUILabel doesn't like it if we set message to nil, which we
accidentally did by loading our viewController into a window (which
calls viewDidLoad, which creates our label and sets message) before we
have set our property. Simple fix to call code in the right order.

## Test Plan:

<img width="1392" height="860" alt="image"
src="https://github.com/user-attachments/assets/c6158b2c-4f8f-4348-9eb0-e863ec72a9e1"
/>

Author: Saadnajmi

packages/react-native/React/DevSupport/RCTPausedInDebuggerOverlayController.mm

@@ -179,10 +179,10 @@ - (void)showWithMessage:(NSString *)message onResume:(void (^)(void))onResume
   [self.alertWindow makeKeyAndVisible];
   [self.alertWindow.rootViewController presentViewController:view animated:NO completion:nil];
 #else // [macOS]
-  self.alertWindow.contentViewController = view;
   view.message = message;
   view.onResume = onResume;
-  
+
+  self.alertWindow.contentViewController = view;
   NSWindow *parentWindow = RCTKeyWindow();
   if (![[parentWindow sheets] doesContain:self->_alertWindow]) {
     [parentWindow beginSheet:self.alertWindow completionHandler:^(NSModalResponse returnCode) {