Changed domains, configured links between VisaApplication and Applicant,created generic repository and repositories for domains

SchengenVisaApi/Infrastructure/Database/Locations/Repositories/Cities/CitiesRepository.cs

@@ -0,0 +1,15 @@
+using Domains.LocationDomain;
+using Infrastructure.Database.Generic;
+using Microsoft.EntityFrameworkCore;
+
+namespace Infrastructure.Database.Locations.Repositories.Cities
+{
+    public class CitiesRepository(IGenericReader reader, IGenericWriter writer, IUnitOfWork unitOfWork)
+        : GenericRepository<City>(writer, unitOfWork), ICitiesRepository
+    {
+        protected override IQueryable<City> LoadDomain()
+        {
+            return reader.GetAll<City>().Include(c => c.Country);
+        }
+    }
+}