[Feature] Add Nx target to lint code with Checkstyle about nxrocks

[tinesoft]

Hi @tschaffter (a.k.a serial issue/feature creator 😅)

In the previous major release of the plugin (v4.0.0) I've added support for formatting/linting via Spotless, which in my opinion is way superior to Checkstyle in terms of features/customizations capabilities( all JVM languages, Maven/Gradle plugins, integration with other tools, etc)

The related formatting executors are:

*nx check-format bootapp
*nx apply-format bootapp or nx do-format bootapp

Do you think that can work for you?

[tschaffter]

Hi @tinesoft,

I appreciate how your plugin helped me to start developing Spring Boot apps inside with Nx. :-)

I will play with Spotless and let you know. Right now I'm battling an issue related to importing a lib in an app (see upcoming comment to #71).