Add InvokeRecActionFakeAsync method to ReCClient

A new asynchronous method `InvokeRecActionFakeAsync` was added to the `ReC.Client` namespace in `ReCClient.cs`. This method sends a POST request to the `api/RecAction/invoke/fake` endpoint. It includes XML documentation comments and accepts an optional `CancellationToken` parameter. The method ensures the response has a successful status code.

src/ReC.Client/ReCClient.cs

@@ -30,5 +30,16 @@ namespace ReC.Client
             var resp = await _http.PostAsync($"api/RecAction/invoke/{profileId}", content: null, ct);
             resp.EnsureSuccessStatusCode();
         }
+
+        /// <summary>
+        /// POST api/RecAction/invoke/fake
+        /// </summary>
+        /// <param name="ct"></param>
+        /// <returns></returns>
+        public async Task InvokeRecActionFakeAsync(CancellationToken ct = default)
+        {
+            var resp = await _http.PostAsync($"api/RecAction/invoke/fake", content: null, ct);
+            resp.EnsureSuccessStatusCode();
+        }
     }
 }