Improve websocket reconnect robustness (#706)

Replace with stripped down NT4 client 

Co-authored-by: Mohammad Durrani <46766905+mdurrani808@users.noreply.github.com>

photon-client/src/plugins/ReconnectingWebsocket.js

@@ -0,0 +1,74 @@
+/**
+ * Auto-reconnecting Websocket, a stripped down version of the NT4 client from
+ * https://raw.githubusercontent.com/wpilibsuite/NetworkTablesClients/2f8d378ac08d5ca703d590cfb019fc4af062db89/nt4/js/src/nt4.js
+ */
+export class ReconnectingWebsocket {
+    constructor(serverAddr,
+        onDataIn_in,
+        onConnect_in,
+        onDisconnect_in) {
+
+        this.onDataIn = onDataIn_in;
+        this.onConnect = onConnect_in;
+        this.onDisconnect = onDisconnect_in;
+
+        // WS Connection State (with defaults)
+        this.serverAddr = serverAddr;
+        this.serverConnectionActive = false;
+
+        //Trigger the websocket to connect automatically
+        this.ws_connect();
+    }
+
+    //////////////////////////////////////////////////////////////
+    // Websocket connection Maintenance
+
+    ws_onOpen() {
+        // Set the flag allowing general server communication
+        this.serverConnectionActive = true;
+
+        console.log("[WebSocket] Connected!");
+
+        // User connection-opened hook
+        this.onConnect();
+    }
+
+    ws_onClose(e) {
+        //Clear flags to stop server communication
+        this.ws = null;
+        this.serverConnectionActive = false;
+
+        // User connection-closed hook
+        this.onDisconnect();
+
+        console.log('[WebSocket] Socket is closed. Reconnect will be attempted in 0.5 second.', e.reason);
+        setTimeout(this.ws_connect.bind(this), 500);
+
+        if (!e.wasClean) {
+            console.error('Socket encountered error!');
+        }
+
+    }
+
+    ws_onError(e) {
+        console.log("[WebSocket] Websocket error - " + e.toString());
+        this.ws.close();
+    }
+
+    ws_onMessage(e) {
+       this.onDataIn(e);
+    }
+
+    ws_connect() {
+        this.ws = new WebSocket(this.serverAddr);
+        this.ws.binaryType = "arraybuffer";
+        this.ws.onopen = this.ws_onOpen.bind(this);
+        this.ws.onmessage = this.ws_onMessage.bind(this);
+        this.ws.onclose = this.ws_onClose.bind(this);
+        this.ws.onerror = this.ws_onError.bind(this);
+
+        console.log("[WebSocket] Starting...");
+    }
+}
+
+export default { ReconnectingWebsocket }