feat: integrate Tailwind CSS with custom theme and animations

Added Tailwind CSS and tw-animate-css imports to globals.css. Introduced a custom dark variant and an extensive @theme inline block with CSS variables for colors, radii, and animations. Included keyframes for shimmer-slide, spin-around, gradient, shine, and background-position-spin to enable consistent theming and dynamic UI effects across the application.

next.config.ts

@@ -1,7 +1,10 @@
 import type { NextConfig } from "next";
+import createNextIntlPlugin from "next-intl/plugin";
+
+const withNextIntl = createNextIntlPlugin("./i18n/request.ts");
 
 const nextConfig: NextConfig = {
   /* config options here */
 };
 
-export default nextConfig;
+export default withNextIntl(nextConfig);