Added connection stocks per person

DatamodelLibrary/StockContext.cs

@@ -13,6 +13,7 @@ namespace DatamodelLibrary
         public DbSet<StockMember> Stocks { get; set; }
         public DbSet<Person> Persons { get; set; }
         public DbSet<Address> Addresses { get; set; }
+        public DbSet<PersonStock> PersonStocks { get; set; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder options)
             => options.UseSqlite("Data Source=Stocks.db");