Several APIs in Mapperly allow referencing other mappings. Currently, only mappings within the same mapper class are supported. This functionality should be extended to support referencing mappings from any mapping class using a fully qualified name, with support for "full nameof" (e.g., MyNamespace.MyMappingClass.MyMappingMethod or nameof(@MyNamespaceMyMappingClass.MyMappingMethod)).

This enhancement should apply to the following attributes:

• MapValueAttribute.Use
• MapPropertyAttribute.Use
• MapPropertyFromSourceAttribute.Use
• IncludeMappingConfigurationAttribute.Name

Rel. #1855
Follows up on: #513 and #1833