Replace functions that have moved to Bordado

[leouieda]

The Bordado package incorporated and expanded our coordinate generation and splitting functions. This was done to make them accessible without the scikit-learn dependency. We can now remove the functions from Verde and replace them internally with the Bordado versions. This will require adding Bordado as a dependency.

Functions to replace:

• grid_coordinates
• scatter_points
• block_split
• rolling_window
• get_region
• line_coordinates
• pad_region
• inside
• median_distance
• profile_coordinates

See fatiando/bordado#27 for the progress of functions being ported to Bordado.