[Documentation] Example Java Gradle Project

[EagleoutIce]

Is your feature request related to a problem? Please describe.
I had difficulties in finding a starting point for using the extension with gradle.

Describe the solution you'd like
A new Java Example for gradle would be nice.

Describe alternatives you've considered
I think, extending #369 would be fine as well!

Additional context
If desired, I can create the example project / extend the quickstart documentation.

[ryanluker]

@EagleoutIce Thanks for the ticket!
We always welcome contributions and improvements, so no worries there.

I have also merged the quickstart readme you pinged me on so that can be extended as well (maybe include a link from the main readme still).

We have example projects here using maven but you probably already found those, thus your want for gradle examples.

[ryanluker]

@EagleoutIce Thanks for the contribution!