add placeholder to chat page

src/routes/chat/+page.svelte

@@ -7,4 +7,8 @@
 	});
 </script>
 
-<div>{currentPrompt}</div>
+<div
+	class="container h-full mx-auto flex flex-col justify-center items-center text-base max-w-prose px-4"
+>
+	<div>WIP</div>
+</div>