Backoffice Api: Server Controller (#12932)

* Add initial implementation using 1 controller pr. action

* Add OpenApiTag attribute

Otherwise the endpoints won't be grouped correctly

* Use correct response type

* Move ApiVersion to endpoint controllers

* Add ServerController suffix to endpoint controllers

src/Umbraco.Cms.ManagementApi/Controllers/Server/ServerControllerBase.cs

@@ -0,0 +1,13 @@
+using Microsoft.AspNetCore.Mvc;
+using NSwag.Annotations;
+using Umbraco.New.Cms.Web.Common.Routing;
+
+namespace Umbraco.Cms.ManagementApi.Controllers.Server;
+
+[ApiController]
+[BackOfficeRoute("api/v{version:apiVersion}/server")]
+[OpenApiTag("Server")]
+public abstract class ServerControllerBase : Controller
+{
+
+}