feat(*): handle more differences in concerto models (contributes to #442)

[sstone1]

Adds detection of the following differences in Concerto models:

• Declaration type changed (concept changed to asset, asset changed to enum, etc)
• Enum value added to an enum
• Enum value removed from an enum
• Field changed to relationship (o Bar bar to --> Bar bar) and vice versa
• Scalar field/relationship changed to array field/relationship (o String value to o String[] value) and vice versa
• Primitive field changed to declaration typed field (o String value to o Bar value) and vice versa
• Namespace of declaration typed field changed (com.example.Bar to com.example.other.Bar)
• Namespace version of declaration typed field incompatibly changed ([email protected] to [email protected])