Support Quarkus fast-jar and legacy-jar build layouts

[quintesse]

It would be useful if the script would by default understand Quarkus apps.

I think the "uber-jar" build layout is already supported (but it would have to be tested to be sure), but the other two layouts are not. The "legacy-jar" one always creates two jars (one xxx.jar and one xxx-runner.jar, it's the latter that's needed) plus a lib folder, while the new "fast-jar" option creates an entire folder with a bunch of files (including the dependencies in a lib folder and even a third jar with the fixed name quarkus-app.jar).