Update ObjC formatting to look more similar to the C++

Also update the auto formatter to run on *.m and *.mm files, and effectively ban breaking on return types entirely, as I think this is ugly.

Diffs=
c7d125c7d Update ObjC formatting to look more similar to the C++

.rive_head

@@ -1 +1 @@
-a61f4c6b55916294a69226fbd8312b602ad37466
+c7d125c7d4efe1233c16c2a95fb7b637b746b010

example/ios/Runner/AppDelegate.m

@@ -3,11 +3,12 @@
 
 @implementation AppDelegate
 
-- (BOOL)application:(UIApplication *)application
-    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-  [GeneratedPluginRegistrant registerWithRegistry:self];
-  // Override point for customization after application launch.
-  return [super application:application didFinishLaunchingWithOptions:launchOptions];
+- (BOOL)application:(UIApplication*)application
+    didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
+{
+    [GeneratedPluginRegistrant registerWithRegistry:self];
+    // Override point for customization after application launch.
+    return [super application:application didFinishLaunchingWithOptions:launchOptions];
 }
 
 @end

example/ios/Runner/main.m

@@ -2,8 +2,10 @@
 #import <UIKit/UIKit.h>
 #import "AppDelegate.h"
 
-int main(int argc, char* argv[]) {
-  @autoreleasepool {
-    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
-  }
+int main(int argc, char* argv[])
+{
+    @autoreleasepool
+    {
+        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+    }
 }