Add synchronous InvokeRecAction method

Added a synchronous version of the `InvokeRecAction` method to
the `ReC.Client` namespace in `ReCClient.cs`. This method
invokes the `POST api/RecAction/invoke/{profileId}` endpoint
synchronously using `GetAwaiter().GetResult()` and returns a
boolean indicating success.

Also included XML documentation comments for the new method,
detailing its purpose, parameters, and return value.

src/ReC.Client/ReCClient.cs

@@ -30,5 +30,16 @@ namespace ReC.Client
             var resp = await _http.PostAsync($"api/RecAction/invoke/{profileId}", content: null, cancellationToken);
             return resp.IsSuccessStatusCode;
         }
+
+        /// <summary>
+        /// POST api/RecAction/invoke/{profileId} (Synchronous version)
+        /// </summary>
+        /// <param name="profileId"></param>
+        /// <returns>True if the request was successful, false otherwise</returns>
+        public bool InvokeRecAction(int profileId)
+        {
+            var resp = _http.PostAsync($"api/RecAction/invoke/{profileId}", content: null).GetAwaiter().GetResult();
+            return resp.IsSuccessStatusCode;
+        }
     }
 }