Implemented main window with QR code for desktop receiver.

receivers/electron/src/main/renderer.js

@@ -0,0 +1,45 @@
+const options = {
+    textTrackSettings: false,
+    autoplay: true,
+    loop: true,
+    controls: false
+};
+
+const player = videojs("video-player", options, function onPlayerReady() {
+    player.src({ type: "video/mp4", src: "./c.mp4" });
+});
+
+
+window.electronAPI.onDeviceInfo((_event, value) => {
+    console.log("onDeviceInfo", value);
+
+    const ipsElement = document.getElementById('ips');
+    if (ipsElement) {
+        ipsElement.innerHTML = `IPs<br>${value.addresses.join('<br>')}`;
+    }
+
+    const fcastConfig = {
+        name: value.name,
+        addresses: value.addresses,
+        services: [
+            { port: 46899, type: 0 },
+            { port: 46898, type: 1 }
+        ]
+    };
+
+    const json = JSON.stringify(fcastConfig);
+    let base64 = btoa(json);
+    base64 = base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
+    const url = `fcast://r/${base64}`;
+    console.log("qr", {json, url, base64});
+
+    const qrCodeElement = document.getElementById('qr-code');
+    new QRCode(qrCodeElement, {
+        text: url,
+        width: 256,
+        height: 256,
+        colorDark : "#000000",
+        colorLight : "#ffffff",
+        correctLevel : QRCode.CorrectLevel.H
+    });
+});