Adds favicon and manifest

Adds favicon and web manifest to improve the app's installability and appearance as a Progressive Web App (PWA).

Also adds `.gitignore` entries for the parser output directories.

app/layout.tsx

@@ -7,6 +7,14 @@ export const metadata = {
   title: "LiveDash-Node",
   description:
     "Multi-tenant dashboard system for tracking chat session metrics",
+  icons: {
+    icon: [
+      { url: "/favicon.ico", sizes: "32x32", type: "image/x-icon" },
+      { url: "/favicon.svg", type: "image/svg+xml" },
+    ],
+    apple: "/icon-192.svg",
+  },
+  manifest: "/manifest.json",
 };
 
 export default function RootLayout({ children }: { children: ReactNode }) {