* Added new Entities and Dtos

* Mapping new classes
* Added new services and Controllers in API

SytelineSaAppEfDataModel/Services/CustomerService.cs

@@ -0,0 +1,13 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using SytelineSaAppEfDataModel.Dtos;
+
+namespace SytelineSaAppEfDataModel.Services;
+
+public class CustomerService(SytelineSaAppDbContext context, IMapper mapper) : ICustomerService
+{
+    public async Task<IList<CustomerDto>> GetAllCustomers()
+    {
+        return await context.Customers.Select(x => mapper.Map<CustomerDto>(x)).ToListAsync();
+    }
+}