[adapters] 优化多线程特性文件结构，增加部分多线程音频系统代码，支持 Worker 子包特性（默认不开启），修复 Devtools 下强制不启用 Worker 问题

adapters/common/engine/AssetManager.js

@@ -1,4 +1,4 @@
-const cacheManager = CC_WORKER_ASSET_PIPELINE ? require('../cache-manager-proxy') : require('../cache-manager');
+const cacheManager = CC_WORKER_ASSET_PIPELINE ? require('../worker/cache-manager-proxy') : require('../cache-manager');
 const { fs, downloadFile, readText, readArrayBuffer, readJson, loadSubpackage, getUserDataPath, exists } = window.fsUtils;
 
 const REGEX = /^https?:\/\/.*/;