add new command cp.

mdrsclient/connection.py

@@ -1,10 +1,13 @@
 import platform
 import threading
 from io import BufferedReader
-from typing import TypedDict, Unpack
+from typing import TypedDict
 
 from requests import Response, Session
 
+# Unpack is new in 3.11
+from typing_extensions import Unpack
+
 from mdrsclient.__version__ import __version__
 from mdrsclient.cache import CacheFile
 from mdrsclient.exceptions import MissingConfigurationException