World generation improvements

Allow for various dimensions for WrappedBiomeManager
Generic layered biome selector
Add tryPlace to WGOs

The biome selector had already been in Vanilla for a while, but I'm sure it's abstract enough for the API. It's modular and based on a layer system.

Vanilla PR: https://github.com/VanillaDev/Vanilla/pull/496

Signed-off-by: Aleksi Sapon <QcTechs@gmail.com>