update resource manager

整理文件目录结构

Assets/YooAsset/Runtime/ResourceManager/DownloadStatus.cs

@@ -0,0 +1,32 @@
+
+namespace YooAsset
+{
+    public struct DownloadStatus
+    {
+        /// <summary>
+        /// 下载是否已经完成
+        /// </summary>
+        public bool IsDone;
+
+        /// <summary>
+        /// 下载进度（0-1f)
+        /// </summary>
+        public float Progress;
+
+        /// <summary>
+        /// 下载文件的总大小
+        /// </summary>
+        public long TotalBytes;
+
+        /// <summary>
+        /// 已经下载的文件大小
+        /// </summary>
+        public long DownloadedBytes;
+
+        public static DownloadStatus CreateDefaultStatus()
+        {
+            DownloadStatus status = new DownloadStatus();
+            return status;
+        }
+    }
+}