Add snippet about pending marketplace listing

Author: benitav

integration-guides/flutterflow-+-powersync.mdx

@@ -9,6 +9,10 @@ import SupabaseConnection from '/snippets/supabase-database-connection.mdx';
 
 Used in conjunction with **FlutterFlow**, PowerSync enables developers to build local-first apps that are robust in poor network conditions and that have highly responsive frontends while relying on Supabase for their backend. This guide walks you through configuring PowerSync within your FlutterFlow project that has Supabase integration enabled.
 
+<Warning>
+The PowerSync FlutterFlow Library is currently in the process of being published to the [Marketplace](https://marketplace.flutterflow.io/search). Check back here soon, or refer to our [legacy guide](/integration-guides/flutterflow-+-powersync/powersync-+-flutterflow-legacy).
+</Warning>
+
 <Tip>
 **New and Improved integration**: Welcome to our updated FlutterFlow integration guide. This version introduces a dedicated PowerSync FlutterFlow Library, offering a simpler and more robust solution compared to the [previous version](/integration-guides/flutterflow-+-powersync/powersync-+-flutterflow-legacy) which required extensive custom code.