NEST-401: Upgrade to Orchard Core pre-1.6 nightly

Lombiq.BaseTheme/Extensions/MigrationServiceCollectionExtensions.cs

@@ -0,0 +1,17 @@
+using Microsoft.Extensions.DependencyInjection;
+using OrchardCore.Data.Migration;
+
+namespace Lombiq.BaseTheme.Extensions;
+
+// We need to use this until the Orchard Core upgrade so we don't have to upgrade submodules to nightly versions. This
+// is the same method as what is in the 1.6 nightly version of Orchard Core. During the upgrade, this can be removed and
+// use the Orchard Core method for data migrations.
+
+/// <summary>
+/// Provides extension methods for <see cref="IServiceCollection"/> to add YesSql migration <see cref="IDataMigration"/>.
+/// </summary>
+public static class MigrationServiceCollectionExtensions
+{
+    public static IServiceCollection AddDataMigration<TDataMigration>(this IServiceCollection services)
+        where TDataMigration : class, IDataMigration => services.AddScoped<IDataMigration, TDataMigration>();
+}

Lombiq.BaseTheme/Startup.cs

@@ -1,3 +1,4 @@
+using Lombiq.BaseTheme.Extensions;
 using Lombiq.BaseTheme.Middlewares;
 using Lombiq.BaseTheme.Migrations;
 using Lombiq.BaseTheme.Services;
@@ -8,7 +9,6 @@
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
-using OrchardCore.Data.Migration;
 using OrchardCore.Modules;
 using OrchardCore.ResourceManagement;
 using System;