IMPROVEMENT: Add option to enrich with shape field

[CaitlinCP]

Right now, we only return separate latitude and longitude coordinates. We do not return a field formatted as a shape.

We should include an option to return an appended shape field.

We will need to:

• Update config parsing to accept two more options for shape fields (SRID 4326, SRID 2272)
• Update example yaml config file
• Update GUI
• Update backend
• Update README to reflect changes
• Create tests

Acceptance criteria:

• User should be able to specify one to four options for geocoding

• SRID 4326 (Point)
• SRID 4326 (Shape)
• SRID 2272 (Point)
• SRID 2272 (Shape)

• Choosing at least one of these will allow the user to geocode. Otherwise, an error should be raised.

• GUI is updated and clear on these options

• Tests cover behavior when the user selects none, one, or all options.

• In-app how-to should reflect the new options.