This improves DX by adding the ability to use ./mvnw, so you aren't
required to manually install Maven anymore.
It also fixes (rare) issues with platform specific Maven builds (e.g.
https://github.com/codehaus-plexus/plexus-compiler/issues/394).
Also use Maven Wrapper in GitHub Actions CI, which eliminates the need
for the stCarols/setup-maven action.
Signed-off-by: Florian Hotze <dev@florianhotze.com>
Florian Hotze