feat: add waitlist signup count

apps/web/src/app/page.tsx

@@ -1,11 +1,14 @@
 import { Hero } from "@/components/landing/hero";
 import { Header } from "@/components/header";
+import { getWaitlistCount } from "@/lib/waitlist";
+
+export default async function Home() {
+  const signupCount = await getWaitlistCount();
 
-export default function Home() {
   return (
     <div>
       <Header />
-      <Hero />
+      <Hero signupCount={signupCount} />
     </div>
   );
 }