nbt: Revives the `types::nbt` file for a `Protocol` implementation.
nbt: Revives the `types::nbt` file for a `Protocol` implementation.

Signed-off-by: Aaron Jacobs <94eb18a3f3d75b115c91915c9ebacc4dd15c8941@gmail.com>

PistonDevelopers/hematite_server,toqueteos/hematite_server,fenhl/hematite_server