add suspense for project cards

apps/dashboard/src/components/fade-in.tsx

@@ -0,0 +1,27 @@
+'use client';
+
+import { useEffect, useRef } from 'react';
+import { cn } from '@/utils/cn';
+
+type Props = {
+  className?: string;
+  children: React.ReactNode;
+};
+
+export function FadeIn({ className, children }: Props) {
+  const ref = useRef<HTMLDivElement>(null);
+  useEffect(() => {
+    if (ref.current) {
+      ref.current.classList.remove('opacity-0');
+      ref.current.classList.add('opacity-100');
+    }
+  }, []);
+  return (
+    <div
+      className={cn('opacity-0 transition-opacity duration-500', className)}
+      ref={ref}
+    >
+      {children}
+    </div>
+  );
+}