chore: SVG favicon with dark mode support (#5)

* Dark mode supporting favicon

* Update public/favicon.svg

Co-authored-by: Anthony Fu <anthonyfu117@hotmail.com>

public/favicon.svg

@@ -1,6 +1,9 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="32" height="32"
-  preserveAspectRatio="xMidYMid meet" viewBox="0 0 32 32">
-  <path
-    d="M27.562 26L17.17 8.928l2.366-3.888L17.828 4L16 7.005L14.17 4l-1.708 1.04l2.366 3.888L4.438 26H2v2h28v-2zM16 10.85L25.22 26H17v-8h-2v8H6.78z"
-    fill="#fff" />
-</svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <style>
+    path { fill: #222; }
+    @media (prefers-color-scheme: dark) {
+      path { fill: #ffffff; }
+    }
+  </style>
+  <path d="M27.562 26L17.17 8.928l2.366-3.888L17.828 4L16 7.005L14.17 4l-1.708 1.04l2.366 3.888L4.438 26H2v2h28v-2zM16 10.85L25.22 26H17v-8h-2v8H6.78z" />
+</svg>