Move cookbook to wiki pages

Author: vishalnarkhede

docs/cookbook.md

@@ -1,4 +1,10 @@
-# Cookbook
+# Notice
+
+Cookbook has been moved to [wiki pages](https://github.com/GetStream/stream-chat-react-native/wiki/Cookbook). Please check it for updated version.
+
+This following document is no longer being maintained and will be removed in future.
+
+------------------------------------------------------------------------------------------------
 
 - [How to customize message component](#how-to-customize-message-component)
 
@@ -1442,4 +1448,4 @@ Usually you want to receive push notification, when your app goes to background.
       </View>
     );
   };
-  ```
+  ```