Make new get_anatomical_layouts() function about scona

[KirstieJane]

Hi @wingedRuslan! Thanks for thinking about this.

I can't think of a use of get_anatomical_layouts that won't be related to visualisation. The coordinates are definitely part of calculating the distance between the regions but that will always use the x, y, z coordinates together. The only use for getting these pairs of coordinates (x, y), (x, z), (y, z) etc is to project the 3D brain onto a 2D plane....for visualisation! So my vote would be to put it in visualisation_helpers. What do you think?