feat: introduce file manager plugin with web UI and file operation capabilities.

plugins/file-manager/manifest.json

@@ -1,9 +1,19 @@
 {
   "name": "file-manager",
-  "version": "1.0.0",
-  "description": "文件管理器插件，提供远程文件浏览和管理功能",
+  "version": "2.0.0",
+  "description": "Web 文件管理器，提供远程文件浏览、上传、下载和管理功能",
   "author": "GoTunnel Official",
   "run_at": "client",
   "type": "app",
-  "icon": "icons/file-manager.svg"
-}
+  "icon": "icons/file-manager.svg",
+  "homepage": "https://github.com/flik/GoTunnel-Plugins",
+  "config_schema": [
+    {
+      "key": "root_path",
+      "label": "根目录",
+      "type": "string",
+      "default": ".",
+      "description": "文件管理的根目录路径，所有操作将限制在此目录内"
+    }
+  ]
+}