Create visualizations module

[amontanez24]

Problem Description

Currently we have a lot of functions that users can use to visualize metrics in this file. Since they aren't necessarily tied to reports and users like them, we should move them to a more visible place.

Expected behavior

• create sdmetrics.visualization module
• Add the following functions to this module
  • get_column_plot
  • get_column_pair_plot
  • get_cardinality_plot
• Move any other functions used by these functions to the new module as well and make them private.
• You should be able to do

  from sdmetrics.visualization import get_column_plot

[amontanez24]

This will be resolved by #443 , #444 , #445