Changes in version 2.0.0                        

Breaking changes

  - aicha is now a ggseg_atlas object (from ggseg.formats) containing
    both 2D and 3D data. The separate aicha_3d object has been removed.

  - Use ggplot() + ggseg::geom_brain(atlas = aicha) for 2D plots and
    ggseg3d::ggseg3d(atlas = aicha) for 3D plots — both from the same
    object.

  - ggseg.formats is now a hard dependency (in Depends).

  - Package URLs updated from LCBC-UiO to ggseg GitHub organisation.