shade-like transformers for uberjar creation

[esteban-aliverti]

Description
When creating an uberjar with Quarkus, there is no way to deal with duplicated resources in the dependencies. The first resource found will be used and any other subsequent resource will be omitted.

This is a typical problem when working with spring or many other frameworks that have duplicate entries under /src/main/resources/META-INF in the different .jar files that compose the framework.

Implementation ideas
The idea would be to
a) Try to integrate with maven's shade plugin. This plugin already has a built-in mechanism to deal with duplicated resources.
b) If the integration with shade is not possible, it would be nice to at least support a similar mechanism to declare transformers for files in the quarkus-maven-plugin.

[ldgut]

Same problem here.
resources/META-INF files are overwritten from files in maven dependencies. This only occurs in the runner.jar uberJar from versions above quarkus 0.22.0. We are using maven-shade plugin 3.2.1 which worked fine in 0.22.0.