New table StockGroups added

DatamodelLibrary/StockContext.cs

@@ -15,6 +15,7 @@ namespace DatamodelLibrary
         public DbSet<Address> Addresses { get; set; }
         public DbSet<PersonStock> PersonStocks { get; set; }
         public DbSet<BackupRegister> BackupRegings { get; set; }
+        public DbSet<ShareModel> StockGroups { get; set; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder options)
             => options.UseSqlite("Data Source=Stocks.db");