Add req.ws to typedefs

Wow, what a dumb oversight.

Author: a-a-GiTHuB-a-a

index.d.ts

@@ -23,6 +23,10 @@ declare module 'fastify' {
     websocketServer: WebSocket.Server,
   }
 
+  interface FastifyReply {
+    ws: boolean
+  }
+
   interface RouteShorthandMethod<
     RawServer extends RawServerBase = RawServerDefault,
     RawRequest extends RawRequestDefaultExpression<RawServer> = RawRequestDefaultExpression<RawServer>,