chore: Initial clean commit

- Removed YuMi/Library/ (138 MB, not tracked)
- Removed YuMi/Resources/ (23 MB, not tracked)
- Removed old version assets (566 files, not tracked)
- Excluded Pods/, xcuserdata/ and other build artifacts
- Clean repository optimized for company server deployment

YuMi/Tools/GCDHelper/GCDHelper.h

@@ -0,0 +1,11 @@
+//
+//  GCDHelper.h
+//  YYMobileFramework
+//
+//  Created by wuwei on 14/7/18.
+//  Copyright (c) 2014年 YY Inc. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+void dispatch_main_sync_safe(dispatch_block_t block);