add heartbeats, better websocket disconnection handling

src/server/Client.ts

@@ -1,11 +1,14 @@
 import WebSocket from 'ws';
-import {ClientID} from '../core/Schemas';
+import { ClientID } from '../core/Schemas';
 
 
 export class Client {
+
+    public lastPing: number
+
     constructor(
         public readonly id: ClientID,
         public readonly ip: string | null,
-        public readonly ws: WebSocket
+        public readonly ws: WebSocket,
     ) { }
 }