Add documentation about groovy configuration

[emartynov]

I'm not fluent in gradle as well I'm not fluent with conversion groovy to kotlin gradle.

It took me some time to find corresponded groovy code for the configurations.

[cdsap]

Hi @emartynov thank you very much for the comment. I understand perfectly and I will work in the doc for groovy!

[emartynov]

No complaints at all! I'm so happy I found Talaiot. It is just reminder for missing things.

[mokkun]

Specific documentation for Groovy might not be ideal because it involves a lot of duplication and in most cases, the DSL is almost the same. But I agree with OP that it can be challenging for newcomers to find the right way of doing things in Groovy.

My suggestion would be to have a sample project that uses Groovy, just like the one we have for Kotlin. It would be easy for us to maintain, and it helps those that are trying to setup Talaiot in their projects for the first time.