结构大修改，改成朴实无华的结构，不过度架构。能跑就行

Assets/Scripts/NBC/Asset/Runtime/Tasks/TaskRunner.cs

@@ -0,0 +1,21 @@
+namespace NBC.Asset
+{
+    public static class TaskRunner
+    {
+        #region Static
+
+        public static readonly DownloadRunner DownloadRunner = new DownloadRunner();
+        public static readonly ProviderRunner ProviderRunner = new ProviderRunner();
+        public static readonly Runner Def = new Runner();
+
+        
+        public static void Update()
+        {
+            DownloadRunner.Process();
+            ProviderRunner.Process();
+            Def.Process();
+        }
+
+        #endregion
+    }
+}