Add Flowkit library

Author: fundon

README.md

@@ -86,6 +86,7 @@ Curators: Christopher, John and Moritz from [React Flow](https://reactflow.dev)
 
 - [egui_node_graph](https://github.com/setzer22/egui_node_graph) - Node applications using egui
 - [egui-snarl](https://github.com/zakarumych/egui-snarl) - Crate for creating and manipulating node-graph UIs
+- [flowkit][https://github.com/viz-rs/flowkit] - A universal UI workflow library, neat, beautiful, and easy to use.
 
 ## Swift Libraries