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.Infrastructure/Repositories/EmailOutRepository.cs

@@ -0,0 +1,14 @@
+using DigitalData.Core.Infrastructure;
+using DigitalData.UserManager.Infrastructure.Repositories;
+using EnvelopeGenerator.Domain.Entities;
+using EnvelopeGenerator.Infrastructure.Contracts;
+
+namespace EnvelopeGenerator.Infrastructure.Repositories
+{
+    public class EmailOutRepository : CRUDRepository<EmailOut, int, EGDbContext>, IEmailOutRepository
+    {
+        public EmailOutRepository(EGDbContext dbContext) : base(dbContext)
+        {
+        }
+    }
+}