fix #519

FileSystemParametersDefine新增参数：INSTALL_CLEAR_MODE

Assets/YooAsset/Runtime/FileSystem/DefaultUnpackFileSystem/DefaultUnpackFileSystem.cs

@@ -14,7 +14,8 @@ namespace YooAsset
             base.OnCreate(packageName, rootDirectory);
 
             // 注意：重写保存根目录和临时目录
-            _cacheBundleFilesRoot = PathUtility.Combine(_packageRoot, DefaultUnpackFileSystemDefine.SaveFilesFolderName);
+            _cacheBundleFilesRoot = PathUtility.Combine(_packageRoot, DefaultUnpackFileSystemDefine.SaveBundleFilesFolderName);
+            _cacheManifestFilesRoot = PathUtility.Combine(_packageRoot, DefaultUnpackFileSystemDefine.SaveManifestFilesFolderName);
             _tempFilesRoot = PathUtility.Combine(_packageRoot, DefaultUnpackFileSystemDefine.TempFilesFolderName);
         }
     }

Assets/YooAsset/Runtime/FileSystem/DefaultUnpackFileSystem/DefaultUnpackFileSystemDefine.cs

@@ -11,8 +11,13 @@ namespace YooAsset
         /// <summary>
         /// 保存的资源文件的文件夹名称
         /// </summary>
-        public const string SaveFilesFolderName = "UnpackFiles";
-        
+        public const string SaveBundleFilesFolderName = "UnpackBundleFiles";
+
+        /// <summary>
+        /// 保存的清单文件的文件夹名称
+        /// </summary>
+        public const string SaveManifestFilesFolderName = "UnpackManifestFiles";
+
         /// <summary>
         /// 下载的临时文件的文件夹名称
         /// </summary>