Yatko/Simple-Android-App — reverse-engineered prompt

Build me a very simple Android app example in Kotlin that I can open in Android Studio and run right away. I just want a clean basic app with a tiny UI that shows Hello World on screen, nothing fancy, and the full source included so it works as a beginner sample project.

Please make it feel like a real starter app, with the normal app icon, package setup, and everything needed to build and launch on a phone or emulator. If there is a release build option, set it up so I can generate an installable app too. Use the included signing info if needed, the keystore is already in the project and the passwords are both helloworld, with the alias simple.

Keep this lightweight and easy to understand since the goal is more of a simple example than a full product. If anything is outdated, check the current Android docs and make whatever small fixes are needed so it builds cleanly now.