Gradle plugin - How do I integrate / use it?

I’m trying to use build.gradle in order to import external libraries.
Here are my questions:

  1. Is katalon-gradle-plugin installed by default? If not what are the steps to install it. The page on github doesn’t really explain how to do this. If it requires a certain version of Katalon, what is the minimal version for it?
  2. When i try to use the build.gradle in the github readme, i get the following message:
    Plugin [id: ‘com.gradle.plugin-publish’, version: ‘0.10.0’] was not found in any of the following sources…
    What am I missing here?

I am fighting the same issue although seems I managed to install the plugin however I can’t run any of my tests now no matter if cucumber-bdd tests or default katalon tests.
Is there planned more detailed documentation for this topic?