refactor(analytics): streamline Google Analytics integration and remove proxy routes

- Replaced the previous Google Analytics proxy routes with a direct integration in the layout component for improved performance and simplicity.
- Updated the Next.js configuration to include new rewrite rules for Google Analytics scripts and collection endpoints.
- Removed outdated proxy logic to enhance code clarity and maintainability.

app/components/GoogleAnalytics.tsx

@@ -0,0 +1,30 @@
+'use client';
+
+import Script from 'next/script';
+
+const GA_MEASUREMENT_ID = 'G-QTT9QT0T3S';
+
+export default function GoogleAnalytics() {
+  return (
+    <>
+      <Script
+        src="/metrics/js/script.js"
+        strategy="afterInteractive"
+      />
+      <Script id="google-analytics" strategy="afterInteractive">
+        {`
+          window.dataLayer = window.dataLayer || [];
+          function gtag(){dataLayer.push(arguments);}
+          gtag('js', new Date());
+
+          gtag('config', '${GA_MEASUREMENT_ID}', {
+            transport_url: '/metrics/collect',
+            cookie_flags: 'SameSite=None;Secure',
+            allow_ad_personalization_signals: false,
+            anonymize_ip: true
+          });
+        `}
+      </Script>
+    </>
+  );
+}