Add minimum viable product

main.m

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