Add maven-jpackage-template

[wiverson]

https://github.com/wiverson/maven-jpackage-template

Template showing how to build JavaFX desktop apps with small jlink JVMs using just Maven (no shell scripts needed). Includes GitHub Actions showing how to build macOS, Windows, and Linux installer packages automatically.

LMK if you prefer a PR, not sure if this is easier?

[AlmasB]

Thanks for this, a PR would be helpful, yeah

[wiverson]

Just sent PR #104 - LMK if that works. :)

[AlmasB]

All merged