Added interfaces to read and write data in DB and added DbContext implementing these

SchengenVisaApi/Infrastructure/Database/Configuration/Common/CountryConfiguration.cs

@@ -0,0 +1,16 @@
+using Domains.Common;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace Infrastructure.Database.Configuration.Common
+{
+    public class CountryConfiguration : IEntityTypeConfiguration<Country>
+    {
+        public void Configure(EntityTypeBuilder<Country> entity)
+        {
+            entity.Property(p => p.Name)
+                .IsUnicode(false)
+                .HasMaxLength(70);
+        }
+    }
+}