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

SchengenVisaApi/Infrastructure/Database/Locations/Repositories/Countries/CountriesRepository.cs

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