Create a few basic skeleton applications to help users during the onboarding process

[zaleslaw]

• Gradle (groovy) for JVM
• Gradle (kts) for JVM
• Android Gradle (groovy)
• Android Gradle (kts)

Android could be based on the https://github.com/Jolanrensen/DataframeTestApplication/tree/master @Jolanrensen project

The goals:

1. be sure that README and onboarding docs are correct
2. make easy the user start-ups
3. improve the release process