I am looking for a workflow builder for my vue.js app, used to build chatbot flows and I honestly have no idea how to do it or what it is called.

I found this but it looks like it is half done
https://github.com/alyssaxuu/flowy

I found something called Node Red, but I am not even sure how to use this in my project - https://nodered.org/

Can someone help?

Here's what I am trying to achieve.
I am looking to build something like this https://alyssax.com/x/flowy/