V14: Add cancellation tokens to all endpoints (#15984)

* Add CancellationToken to controllers

* Fix GetManagementApiUrl

* Forgotten Item and Tree controllers

* Document Blueprint and Version endpoints

* Fix merge conflict

* Cleanup

---------

Co-authored-by: Elitsa <elm@umbraco.dk>

src/Umbraco.Cms.Api.Management/Controllers/PartialView/Tree/RootPartialViewTreeController.cs

@@ -18,6 +18,9 @@ public class RootPartialViewTreeController : PartialViewTreeControllerBase
     [HttpGet("root")]
     [MapToApiVersion("1.0")]
     [ProducesResponseType(typeof(PagedViewModel<FileSystemTreeItemPresentationModel>), StatusCodes.Status200OK)]
-    public async Task<ActionResult<PagedViewModel<FileSystemTreeItemPresentationModel>>> Root(int skip = 0, int take = 100)
+    public async Task<ActionResult<PagedViewModel<FileSystemTreeItemPresentationModel>>> Root(
+        CancellationToken cancellationToken,
+        int skip = 0,
+        int take = 100)
         => await GetRoot(skip, take);
 }