Autogenerate POM for Github "Used by"

The library used in this repository is not linked in the Github "Used by", because Gradle it is not supported yet.

I found a workaround some time ago, described [in this post](https://stackoverflow.com/questions/57903806/adding-used-by-inside-the-github-project-with-gradle-and-java) the only thing to do is adding the autogeneration of `pom.xml` file in the Gradle file.

No file path is named. Inspect the repository's Gradle build file and the linked workaround first, then verify that the generated pom.xml is published or recognized by GitHub's Used by view; done means the library appears there without manual steps.

Written by the indexing model from the issue text.