Added suuport to inject an IOqtaneDatabase in EntityBuilders to allow each Database to control certain Migration behaviors. Also updated Installer to dynamically build Database Configuration section

Oqtane.Shared/Interfaces/IOqtaneDatabase.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Migrations.Operations;
+using Microsoft.EntityFrameworkCore.Migrations.Operations.Builders;
+using Oqtane.Models;
+
+namespace Oqtane.Interfaces
+{
+    public interface IOqtaneDatabase
+    {
+        public string FriendlyName { get; }
+
+        public string Name { get; }
+
+        public string Provider { get; }
+
+        public List<ConnectionStringField> ConnectionStringFields { get; }
+
+        public OperationBuilder<AddColumnOperation> AddAutoIncrementColumn(ColumnsBuilder table, string name);
+
+        public string BuildConnectionString();
+
+        public DbContextOptionsBuilder UseDatabase(DbContextOptionsBuilder optionsBuilder, string connectionString);
+    }
+}