feat(performance): Add async utility functions and filesystem utilities

- Implemented async utilities including delay, retryWithBackoff, withTimeout, parallelLimit, debounceAsync, AsyncMutex, and CircuitBreaker.
- Created tests for async utilities to ensure functionality and reliability.
- Developed AsyncFileSystem class with methods for file and directory operations, including ensureDir, readFile, writeFile, remove, and more.
- Added tests for filesystem utilities to validate file operations and error handling.

ts/plugins.ts

@@ -4,11 +4,12 @@ import * as fs from 'fs';
 import * as http from 'http';
 import * as https from 'https';
 import * as net from 'net';
+import * as path from 'path';
 import * as tls from 'tls';
 import * as url from 'url';
 import * as http2 from 'http2';
 
-export { EventEmitter, fs, http, https, net, tls, url, http2 };
+export { EventEmitter, fs, http, https, net, path, tls, url, http2 };
 
 // tsclass scope
 import * as tsclass from '@tsclass/tsclass';