refactor the runtime code

重构了运行时代码，支持全新的文件系统。

Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs

@@ -10,14 +10,12 @@ namespace YooAsset
         // 用户请求的回调
         private Action<AsyncOperationBase> _callback;
 
+        // 所属包裹
+        private string _packageName = null;
+
         // 是否已经完成
         internal bool IsFinish = false;
 
-        /// <summary>
-        /// 所属包裹
-        /// </summary>
-        public string PackageName { private set; get; }
-
         /// <summary>
         /// 优先级
         /// </summary>
@@ -88,9 +86,13 @@ namespace YooAsset
         internal abstract void InternalOnUpdate();
         internal virtual void InternalOnAbort() { }
 
+        internal string GetPackageName()
+        {
+            return _packageName;
+        }
         internal void SetPackageName(string packageName)
         {
-            PackageName = packageName;
+            _packageName = packageName;
         }
         internal void SetStart()
         {
@@ -116,11 +118,19 @@ namespace YooAsset
             {
                 Status = EOperationStatus.Failed;
                 Error = "user abort";
-                YooLogger.Warning($"Async operaiton has been abort : {this.GetType().Name}");
+                YooLogger.Warning($"Async operaiton {this.GetType().Name} has been abort !");
                 InternalOnAbort();
             }
         }
 
+        /// <summary>
+        /// 等待异步执行完毕
+        /// </summary>
+        public virtual void WaitForAsyncComplete()
+        {
+            throw new System.NotImplementedException(this.GetType().Name);
+        }
+
         /// <summary>
         /// 清空完成回调
         /// </summary>