intave/loader ? reverse-engineered prompt

Build me a small Java project called loader that can act like a simple loading utility or starter app.

I want the project set up so it compiles cleanly with Gradle, has a sensible package structure, and includes a few example classes and tests so I can understand how it works right away. Make the main code easy to extend, with clear entry points and basic error handling. If there are any current best practices I should follow for the latest Java and Gradle setup, feel free to look them up online and use them.

Keep it lightweight and clean, not overengineered. I mainly want a working foundation that I can open in an IDE, run, and build on from there. If something is unclear from the existing files, make the simplest reasonable choice and get it working end to end.