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/DTOs/EmailOutDto.cs

@@ -0,0 +1,25 @@
+namespace EnvelopeGenerator.Application.DTOs
+{
+    public record EmailOutDto(
+        int Guid,
+        int ReminderTypeId,
+        int SendingProfile,
+        int ReferenceId,
+        string? ReferenceString,
+        int? EntityId,
+        int WfId,
+        string? WfReference,
+        string EmailAdress,
+        string EmailSubj,
+        string EmailBody,
+        string? EmailAttmt1,
+        DateTime? EmailSent,
+        string? Comment,
+        string AddedWho,
+        DateTime? AddedWhen,
+        string? ChangedWho,
+        DateTime? ChangedWhen,
+        DateTime? ErrorTimestamp,
+        string? ErrorMsg
+    );
+}