Create Parent Child Relationships property class

[amontanez24]

Problem Description

Once #357 is done, we can migrate the code for computing the parent child relationship scores to a property class.

Expected behavior

Attributes

• metrics: [CardinalityShapeSimilarity]
• _properties: None

Abstract methods

• get_score(real_data, synthetic_data, metadata) - Average the scores calculated when running the CardinalityShapeSimilarity metric.
• get_visualization(table_name) - Just a wrapper around the single table get_visualization method.

Additional context

• Unlike the other properties, this one has no single table equivalent. The metric itself is designed to handle multi table data, so this class will not have to use any single table properties.