initial changes to migrate to new Blazor approach in .NET 8

Oqtane.Server/Extensions/ComponentEndpointRouteBuilderExtensions.cs

@@ -0,0 +1,29 @@
+#nullable enable
+using Oqtane.Components;
+using Microsoft.AspNetCore.Components.Endpoints;
+using Microsoft.AspNetCore.Routing;
+using System;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace OqtaneSSR.Extensions
+{
+    public static class ComponentEndpointRouteBuilderExtensions
+    {
+        public static void MapFallback(this IEndpointRouteBuilder endpoints)
+        {
+            ArgumentNullException.ThrowIfNull(endpoints);
+
+            endpoints.MapFallback((ctx) =>
+            {
+                var invoker = ctx.RequestServices.GetRequiredService<IRazorComponentEndpointInvoker>();
+                return invoker.Render(ctx);
+            })
+            .Add(routeEndpointBuilder =>
+            {
+                routeEndpointBuilder.Metadata.Add(new RootComponentMetadata(typeof(App)));
+                routeEndpointBuilder.Metadata.Add(new ComponentTypeMetadata(typeof(App)));
+            });
+        }
+    }
+}