Support for dynamic object mapping

[TimothyMakkison]

Similarly to Automapper, Mapperly should support mapping objects and Dictionary<string, object> to and from dynamic types.

Supporting DeepClone may be tricky, plus should we assume that all dynamic types are ExpandoObject

public static partial Dog ToDog(dynamic src) // construct dog and access relevant types from dynamic in a try catch block

public static partial dynamic ToDynamic(Dog src) return (dyanmic)src // should an ExpandoObject be created and properties copied over?

See #1039