Add EmailOut components: entity, DTO, repository, and services

- Introduced EmailOut and EmailOutDto for data management.
- Added EmailOutRepository and service interfaces based on CRUD patterns.

EnvelopeGenerator.Application/MappingProfiles/BasicDtoMappingProfile.cs

@@ -21,6 +21,7 @@ namespace EnvelopeGenerator.Application.MappingProfiles
             CreateMap<EnvelopeType, EnvelopeTypeDto>();
             CreateMap<Receiver, ReceiverDto>();
             CreateMap<UserReceiver, UserReceiverDto>();
+            CreateMap<EmailOut, EmailOutDto>();
 
             // DTO to Entity mappings
             CreateMap<ConfigDto, Config>();
@@ -35,6 +36,7 @@ namespace EnvelopeGenerator.Application.MappingProfiles
             CreateMap<EnvelopeTypeDto, EnvelopeType>();
             CreateMap<ReceiverDto, Receiver>();
             CreateMap<UserReceiverDto, UserReceiver>();
+            CreateMap<EmailOutDto, EmailOut>();
         }
     }
 }