Essential-Commands

46140a03 - Don't create/init managers if their relevant features are disabled.

Don't create/init managers if their relevant features are disabled. - Rename WorldDataManager.init to WorldDataManager.onServerStart to be consistent with other managers. - Update MinecraftLocation to use MC's Vec3d class for position. - Make PlayerTeleporter.requestTeleport use PlayerTeleporter.teleport instead of reimplementing. - Use functional-ify PlayerData's writeNbt method & create fewer temp variables in fromNbt.