Move SqlServer databases into a separate project

Oqtane.Database.SqlServer/SqlServerDatabaseBase.cs

@@ -0,0 +1,28 @@
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Migrations.Operations;
+using Microsoft.EntityFrameworkCore.Migrations.Operations.Builders;
+using Oqtane.Models;
+using Oqtane.Shared;
+
+namespace Oqtane.Repository.Databases
+{
+    public abstract class SqlServerDatabaseBase : OqtaneDatabaseBase
+    {
+        protected SqlServerDatabaseBase(string name, string friendlyName, List<ConnectionStringField> connectionStringFields) : base(name, friendlyName, connectionStringFields)
+        {
+        }
+
+        public override string Provider => "Microsoft.EntityFrameworkCore.SqlServer";
+
+        public override OperationBuilder<AddColumnOperation> AddAutoIncrementColumn(ColumnsBuilder table, string name)
+        {
+            return table.Column<int>(name: name, nullable: false).Annotation("SqlServer:Identity", "1, 1");
+        }
+
+        public override DbContextOptionsBuilder UseDatabase(DbContextOptionsBuilder optionsBuilder, string connectionString)
+        {
+            return optionsBuilder.UseSqlServer(connectionString);
+        }
+    }
+}