added script.js and web manifest for pwa

also made div for top nav and added a css id for topbarTitle currnetly empty

app.webmanifest

@@ -0,0 +1,16 @@
+{
+  "name": "neon443 Progressive Web App",
+  "short_name": "neon443",
+  "description": ".",
+  "icons": [
+    {
+      "src": "./images/app-icon.png",
+      "sizes": "512×512",
+      "type": "image/png"
+    }
+  ],
+  "start_url": "https://neon443.github.io/",
+  "display": "fullscreen",
+  "theme_color": "#000",
+  "background_color": "#000"
+}