New: Use ASP.NET Core instead of Nancy

src/Radarr.Api.V3/Config/UiConfigController.cs

@@ -0,0 +1,19 @@
+using NzbDrone.Core.Configuration;
+using Radarr.Http;
+
+namespace Radarr.Api.V3.Config
+{
+    [V3ApiController("config/ui")]
+    public class UiConfigController : ConfigController<UiConfigResource>
+    {
+        public UiConfigController(IConfigService configService)
+            : base(configService)
+        {
+        }
+
+        protected override UiConfigResource ToResource(IConfigService model)
+        {
+            return UiConfigResourceMapper.ToResource(model);
+        }
+    }
+}