Reduce Clutter in Root Folder

### What feature do you want to see added? Right now, there is no way to store all the worlds in a separate folder, making the root folder look like a mess for servers with lots of worlds. I would like to be able to store all of the worlds created with this plugin in a different folder, or maybe even as an argument for the command to create the world. ### Are there any alternatives? You can manually move all of the world files, or change the `world-container` in bukkit.yml ### Anything else? _No response_