Adding macos files, recreating android and ios. (#217)

animations/ios/Runner/AppDelegate.h

@@ -1,6 +0,0 @@
-#import <Flutter/Flutter.h>
-#import <UIKit/UIKit.h>
-
-@interface AppDelegate : FlutterAppDelegate
-
-@end

animations/ios/Runner/AppDelegate.m

@@ -1,13 +0,0 @@
-#include "AppDelegate.h"
-#include "GeneratedPluginRegistrant.h"
-
-@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];
-}
-
-@end

animations/ios/Runner/Runner-Bridging-Header.h

@@ -1 +1 @@
-#import "GeneratedPluginRegistrant.h"
+#import "GeneratedPluginRegistrant.h"

animations/ios/Runner/main.m

@@ -1,9 +0,0 @@
-#import <Flutter/Flutter.h>
-#import <UIKit/UIKit.h>
-#import "AppDelegate.h"
-
-int main(int argc, char* argv[]) {
-  @autoreleasepool {
-    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
-  }
-}