refactor: 移除旧式双文件配置支持

- 简化配置加载逻辑，仅支持模块化配置
- 移除所有处理旧式配置文件的代码
- 创建配置迁移脚本，便于用户从旧版本迁移

package.json

@@ -9,7 +9,9 @@
     "dev": "node src/generator.js && serve dist",
     "clean": "rm -rf dist",
     "build": "npm run clean && npm run generate",
-    "restructure": "node restructure.js"
+    "restructure": "node restructure.js",
+    "migrate-config": "node src/migrate-config.js",
+    "import-bookmarks": "node src/bookmark-processor.js"
   },
   "keywords": [
     "navigation",