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.

i18n/request.ts

@@ -0,0 +1,14 @@
+import { getRequestConfig } from "next-intl/server";
+import { routing } from "./routing";
+
+export default getRequestConfig(async ({ requestLocale }) => {
+  let locale = await requestLocale;
+  if (!locale || !routing.locales.includes(locale as any)) {
+    locale = routing.defaultLocale;
+  }
+  return {
+    locale,
+    messages: (await import(`../messages/${locale}.json`)).default,
+  };
+});
+