chore: 更新静态资源文件并清理构建输出目录

删除旧的构建输出文件，包括图片资源和编译生成的JavaScript文件
添加新的图标资源文件到assets/img目录
更新package.json中的开发脚本配置

.output/server/node_modules/asynckit/lib/async.js

@@ -1,34 +0,0 @@
-var defer = require('./defer.js');
-
-// API
-module.exports = async;
-
-/**
- * Runs provided callback asynchronously
- * even if callback itself is not
- *
- * @param   {function} callback - callback to invoke
- * @returns {function} - augmented callback
- */
-function async(callback)
-{
-  var isAsync = false;
-
-  // check if async happened
-  defer(function() { isAsync = true; });
-
-  return function async_callback(err, result)
-  {
-    if (isAsync)
-    {
-      callback(err, result);
-    }
-    else
-    {
-      defer(function nextTick_callback()
-      {
-        callback(err, result);
-      });
-    }
-  };
-}