Fabric Port

[shadowhunt22]

My uncle needed a Fabric port for our server, and after some testing, I am finally making the pull request. This also solves #4.

The changes are as follows:

• Converted the project from a Maven project to a Gradle project to better facilitate dependencies.
• Created a Paper and Fabric subproject

Just to be clear, I put you and I as authors in the fabric.mod.json. File link.

Some other considerations:

• Have a common API. Both Paper and Fabric use the same code to give BlueMap the player icon for Bedrock players. I know what needs to be done, but even after making a number of mods on the Fabric platform, I still don't understand how to do this. And even if I did, I don't have the time to do it anymore.

[TechnicJelle]

Thank you for this PR! It looks very well-made.

Though I must mention I'm not too big of a fan of Gradle...
I understand it's the standard for fabric mods, though..

I hope to be able to test this soon™
Until then, could you maybe compile a build for this and put it on your fork's releases page?
So in the meantime, I can point people who need this to your fork, so they can download the Fabric version :)

[shadowhunt22]

I sure can do!

[shadowhunt22]

https://github.com/shadowhunt22/BlueMapFloodgate/releases/tag/v1.0.0