Enhance UI with animations, fonts, and improved visuals

Added custom animations (fadeIn, popIn, and rowPulse) for smoother transitions and visual effect. Integrated Google Fonts to improve typography and updated background design to enrich user experience. Styles were refined for better consistency and responsiveness across elements.

frontend/index.html

@@ -4,6 +4,9 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Cluedo Sheet</title>
+    <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=Cinzel+Decorative:wght@400;700&family=IM+Fell+English:ital@0;1&display=swap" rel="stylesheet">    
   </head>
   <body>
     <div id="root"></div>