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

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

src/Umbraco.Cms.Api.Management/Controllers/Script/Tree/AncestorsScriptTreeController.cs

@@ -17,6 +17,8 @@ public class AncestorsScriptTreeController : ScriptTreeControllerBase
     [HttpGet("ancestors")]
     [MapToApiVersion("1.0")]
     [ProducesResponseType(typeof(IEnumerable<FileSystemTreeItemPresentationModel>), StatusCodes.Status200OK)]
-    public async Task<ActionResult<IEnumerable<FileSystemTreeItemPresentationModel>>> Ancestors(string descendantPath)
+    public async Task<ActionResult<IEnumerable<FileSystemTreeItemPresentationModel>>> Ancestors(
+        CancellationToken cancellationToken,
+        string descendantPath)
         => await GetAncestors(descendantPath);
 }