Issues with project generation on Windows

[ia3andy]

Describe the bug
Initially found by @stuartwdouglas quarkusio/code.quarkus.io#66

With a zip created using CreateProject: https://github.com/fabric8-launcher/launcher-quarkus/blob/master/src/main/kotlin/io/launcher/quarkus/LauncherQuarkus.kt#L45

The zip does not unpack correctly on Windows, instead of src/main/java/org/example/ClassFile.java you get src/main/java//org/example//ClassFile.java
${path} is not replaced with an actual value, so the generated application does not work

Expected behavior
The zip should unpack without any problem and generated application should work

@stuartwdouglas could you give more info on this?

[ia3andy]

This has been fixed by #3397