feat(frontend): add service favicon

frontend/public/favicon.svg

@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" role="img" aria-label="Календарь стартов">
+  <defs>
+    <linearGradient id="bg" x1="12" y1="4" x2="52" y2="60" gradientUnits="userSpaceOnUse">
+      <stop offset="0" stop-color="#1168d8" />
+      <stop offset="1" stop-color="#071927" />
+    </linearGradient>
+  </defs>
+  <rect width="64" height="64" rx="16" fill="url(#bg)" />
+  <path
+    d="M18 20h28a5 5 0 0 1 5 5v21a5 5 0 0 1-5 5H18a5 5 0 0 1-5-5V25a5 5 0 0 1 5-5Z"
+    fill="#ffffff"
+  />
+  <path d="M13 29h38" stroke="#d6e1ea" stroke-width="4" />
+  <path d="M23 14v11M41 14v11" stroke="#b9f24a" stroke-width="5" stroke-linecap="round" />
+  <path
+    d="M22 41c5-8 13-8 18 0M22 41h18"
+    fill="none"
+    stroke="#1168d8"
+    stroke-width="5"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+  />
+  <circle cx="44" cy="44" r="5" fill="#ff6f5e" />
+</svg>