* Added WebSocketServer class with configurable options
* Introduced WebSocketServerFactory for creating WebSocket relay servers
* Updated index.ts to set up a server with WebSocket support and handle various signals for graceful shutdown
* Adjusted maxPayloadLength to 16 MB
* Set backPressureLimit to 1 MB
* Added new socket event handlers: onSocketError, onSocketOpen, onSocketMessage, onSocketDrain, and onSocketClose
