Hi, I'm not sure you're going to find that answer here. I don't know which channel would be more appropriate, maybe just #getting-started.
Why are you searching for this? It seems to me like it would be unlikely to wield good quality results. In my experience, code generators for diagrams tend to generate low quality software. Also, Kotlin is a pretty diverse language, many patterns can be solved in many different ways (unlike Java which you can mostly model with a simple UML class diagram)