Auto spread config

[MelanX]

Describe your idea

Add different types of auto-spreading. For a skyblock island, a circle around it would be nice.

Current ideas:

• circle
• square
• sphere
• box

For circle and square, a horizontal distance would be applicable. That could be a fixed value, or randomly selected (for each spread) based on min and max distance.
For sphere and box, a vertical distance needs to be added.

Don't forget to add a way to detect collisions with base island and avoid it. Maybe that should be up to the pack dev, you can't fix everything for everyone