refactor: warn about future transfer of this class to crappy.collection

src/crappy/camera/gphoto2_camera.py

@@ -5,6 +5,7 @@
 from time import time
 from typing import Optional, Tuple, Dict, Any
 import logging
+from warnings import warn
 
 from .meta_camera import Camera
 from .._global import OptionalModule
@@ -43,6 +44,11 @@ class CameraGPhoto2(Camera):
   def __init__(self) -> None:
     """Instantiates the available settings."""
 
+    warn(f"Starting from version 2.1.0, {type(self).__name__} will be moved "
+         f"to crappy.collection. Your code that uses it will still work as "
+         f"is, except you will now need to import crappy.collection at the "
+         f"top of your script.", FutureWarning)
+
     super().__init__()
 
     # Attributes used for image acquisition