Support generating a Scala project

[jvican]

Version

Which version(s) did you encounter this bug ? Starter UI 3.8.5

Context

Generating a Maven or Gradle build for Scala is not supported. Given that vertx has Scala support, I believe it would be good to advertise that support in the build starter UI. Otherwise it might give the wrong impression that it isn't supported.

[tsegismont]

@jvican hi. The choice of languages and build tools is intentionally limited to the most common usages. For example, there's no Groovy either though it's been so far a popular language for Vert.x apps.

Perhaps we could add a link to GH templates for other languages. Do we have such a template for Scala @codepitbull ?

[jvican]

I understand the rationale. The Scala community is pretty big and I feel like exposing it in the default UI would motivate more Scala developers to invest in Vertx to build their applications. Otherwise, people are more likely to dismiss it as a Java toolkit that isn't worth their time. This is my personal impression, it might be wrong though.