Lots of technical improvements

src/manifest.webmanifest

@@ -0,0 +1,25 @@
+{
+  "name": "Andreas Dahm – Playground",
+  "short_name": "AD Playground",
+  "description": "Portfolio and interactive playground of Andreas Dahm: algorithm visualizations, GPU simulations and personal projects.",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "orientation": "any",
+  "background_color": "#313131",
+  "theme_color": "#313131",
+  "lang": "en",
+  "icons": [
+    {
+      "src": "assets/icons/app-icon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "favicon.ico",
+      "sizes": "16x16 29x32",
+      "type": "image/x-icon"
+    }
+  ]
+}