feat: implement Testimonials section with dynamic data fetching and UI integration

apps/landing/src/services/get-globals-testimonials-section.ts

@@ -0,0 +1,7 @@
+import { payload } from '../lib/payload';
+
+export async function getGlobalsTestimonialsSection() {
+  return await payload.findGlobal({
+    slug: 'testimonials-section',
+  });
+}