feat: Add Kernel Panic 404 page as project and link in footer

- Add 404 link in footer
- Add Kernel Panic 404 as featured project in seed data
- Project includes interactive terminal, Easter eggs, and retro effects

app/components/Footer.tsx

@@ -115,6 +115,13 @@ const Footer = () => {
             >
               Privacy Policy
             </Link>
+            <Link
+              href="/404"
+              className="text-stone-500 hover:text-stone-800 transition-colors duration-200 font-mono text-xs"
+              title="Kernel Panic 404"
+            >
+              404
+            </Link>
           </div>
           
           <div className="text-xs text-stone-400 flex items-center space-x-1">