feat: publish Allay to a self-hosted maven repo instead of using jitpack

[solonovamax]

Hi,
I noticed that Allay currently is relying on jitpack for distributing maven artifacts.

It would be extremely nice if a normal maven repository could be used instead of jitpack.
You can run a maven server served straight off of the file system via nginx, but I would honestly recommend checking out reposilite. You can run it on basically the cheapest vps you can find.