Create manifest.webmanifest

manifest.webmanifest

@@ -0,0 +1,16 @@
+{
+  "name": "Từ điển Hoàng Phê (Offline)",
+  "short_name": "Từ điển HP",
+  "start_url": "./index.html",
+  "display": "standalone",
+  "background_color": "#fffaf2",
+  "theme_color": "#7a0000",
+  "icons": [
+    {
+      "src": "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Crect width='512' height='512' rx='96' fill='%237a0000'/%3E%3Ctext x='50%25' y='56%25' text-anchor='middle' font-size='220' font-family='Georgia' fill='%23ffd700'%3ETD%3C/text%3E%3C/svg%3E",
+      "sizes": "512x512",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    }
+  ]
+}