Create gradle plugin

Create a Gradle plugin for [JeKa](https://jeka.dev/?utm_source=chatgpt.com), similar to the existing Maven plugin integration.

The plugin should expose the following tasks:

- wrap
- wrapPackage

It should also provide configuration properties for:

- appModule
- args
The goal is to allow Gradle users to integrate JeKa wrapping and packaging capabilities directly from their Gradle build, in a way consistent with the existing Maven plugin experience.