This repository contains an example project for setting up build.gradle.kts to include the required Sigbla repository and dependency, together with a simple Main.kt to prove it works.
Please see the Sigbla documentation for further details, as well as the sigbla-app repository.
If you're looking for examples of Sigbla apps, take a look at https://github.com/sigbla/sigbla-app/tree/master/examples