Macro define_person_property_with_default

macro_rules! define_person_property_with_default {
    ($person_property:ident, $value:ty, $default:expr) => { ... };
}

Defines a person property with the following parameters:

• $person_property: A name for the identifier type of the property
• $value: The type of the property’s value
• $default: An initial value