[LowPrio] [JPMS] ADD Java module descriptor

[bademux]

It will be nice to have Java Platform Module System (project Jigsaw). I'm using JMPS with Jlink to create app+JDK distribution, but JPMS helps to expose only public APIs from the lib.

[besidev]

We are using many flexmark dependencies in many Gradle projects configured with JPMS. Some gradle plugins cannot be upgrade anymore because they rely on the fact that all libraries should be fully modularised. Please take in consideration to increase the priority of this issue.