Add add_column_relationship method to single table metadata

[amontanez24]

Problem Description

As a user, I'd like to be able to specify when certain columns are related (eg. address columns) so that the SDV can handle them appropriately.

Expected behavior

Add a new method to the metadata classes called add_column_relationship.

• Single table
  • add_column_relationship(type: str, column_names: list)
    • type: A string with the type of relationship. Only possibility for now is "address"
    • column_names: A list of column names

metadata.add_column_relationship(
  type="address",
  column_names=["vendor_city", "vendor_state", "vendor_zipcode", ...]
)

Calling this method should add the relationship to the metadata so tat inspecting the metadata yields

{
  "columns": {
    "user_lat": { "sdtype": "latitude" },
    "user_lon": { "sdtype": "longitude" },
  },
  "column_relationships": [{
    "type": "gps_coordinate",
    "column_names": ["user_lat", "user_lon" ],
  }]
}

• Multi table
  • add_column_relationship(type: str, table_name: str, column_names: list)
    • type: A string with the type of relationship. Only possibility for now is "address"
    • table_name: Name of the table that the relationship is in.
    • column_names: A list of column names

Calling this method should add the relationship to the metadata so tat inspecting the metadata yields

{
  "tables": {
    "users": {
      "columns": {
         "user_lat": { "sdtype": "latitude" },
         "user_lon": { "sdtype": "longitude" },
      },
      "column_relationships": [{
         "type": "gps_coordinate",
         "column_names": ["user_lat", "user_lon" ],
      }]
    }
  },
  "relationships": [{
    ...
  }]
}

Additional context

• This should use the same validation as Add column relationship validation to single table metadata #1698