Add R2 image uploads to admin

frontend/site/public/favicon.svg

@@ -0,0 +1,18 @@
+<svg width="400" height="400" viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="faviconGradient" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0%" stop-color="#e5485f"/>
+      <stop offset="100%" stop-color="#25aba4"/>
+    </linearGradient>
+  </defs>
+  <text
+    x="200"
+    y="250"
+    text-anchor="middle"
+    dominant-baseline="middle"
+    font-family="Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif"
+    font-size="270"
+    font-weight="800"
+    letter-spacing="-4"
+    fill="url(#faviconGradient)">´༥`</text>
+</svg>