Landmark Fallback Typing

[sisby-folk]

Landmark classes should contain a method that returns a "fallback landmark"

This defaults to creating a SimplePointLandmark from the available fields.

Simple landmark types should have a nullable "originalType" ID field where the actual type of the landmark can be inserted.

These should be networked whenever landmarks are networked - and taken when the other doesn't exist.

[sisby-folk]

might be worth storing the full NBT of the unknown landmark? that way a client-side landmark could appear in-full on multiple clients when shared. (a bit insecure though)