Add maven supports

[alexandre-cartapanis]

Adding maven build file and maven wrapper

[eugene-kamenev]

@alexandre-cartapanis Hi, why there is a need of maven build? I use gradle to build the jars.

./gradlew publishAllPublicationsToMavenLocalRepository

[alexandre-cartapanis]

Hi, and thanks for your great work on MatrixProfile.

Many reasons, maven is still the most used build system in java ecosystem by far, and many devs knows maven better than gradle.

In our specific case, we have a full CICD chain, that is based on maven, thus it is way easier for us to build with maven rather than with gradle. As this library is not publicly available on Maven Central Repository, we have to integrate the build in our CICD chain. Having the possibility to build with maven will simply avoid us from forking the repository.

But feel free to reject this PR if you think it is useless, we can keep our fork and build from it.

[eugene-kamenev]

@alexandre-cartapanis I published the release to GitHub packages.

[alexandre-cartapanis]

Great thanks !