Enhance app title with Orbitron font, gradient shimmer, and text stroke

Load Orbitron from Google Fonts for the h1 title and version badge.
Add animated gradient shimmer sweep and accent-colored text outline.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/templates/index.html

@@ -5,6 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>LED Grab</title>
     <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='0.9em' font-size='90'>💡</text></svg>">
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Orbitron:wght@700&display=swap" rel="stylesheet">
     <!-- PWA -->
     <meta name="theme-color" content="#1a1a1a">
     <meta name="apple-mobile-web-app-capable" content="yes">