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.

public/manifest.json

@@ -0,0 +1,19 @@
+{
+  "name": "LiveDash",
+  "short_name": "LiveDash",
+  "icons": [
+    {
+      "src": "/favicon.svg",
+      "sizes": "32x32",
+      "type": "image/svg+xml"
+    },
+    {
+      "src": "/icon-192.svg",
+      "sizes": "192x192",
+      "type": "image/svg+xml"
+    }
+  ],
+  "theme_color": "#3b82f6",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}