Use the blinking cat as the favicon

A square, trimmed copy of cat/blink.webp, so it isn't squished in the tab.
Browsers that don't animate favicons show the first frame, eyes open.
Files at the public/ root are no longer gallery tiles.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

index.html

@@ -4,6 +4,7 @@
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width,initial-scale=1">
 <title>vibegif</title>
+<link rel="icon" type="image/webp" href="/favicon.webp">
 <meta name="description" content="public domain gallery of 1000 gifs and animated webp">
 <script>try{localStorage.bg&&document.documentElement.classList.add("dark")}catch{}</script>
 <style>