Merge pull request graphql#1023 from agent3bood/patch-1

Add Ferry client

Author: orta

src/content/code/language-support/flutter/client/ferry.md

@@ -0,0 +1,8 @@
+---
+name: Ferry
+description: Ferry is a simple, powerful GraphQL Client for Flutter and Dart.
+url: https://ferrygraphql.com/
+github: gql-dart/ferry
+---
+
+