NEW: Add Event to public API (#501)

Downstream packages that want to use Event to type hint their APIs
should be able to import Event without accessing private modules.

Author: carterbox

cuda_core/cuda/core/experimental/__init__.py

@@ -4,7 +4,7 @@
 
 from cuda.core.experimental import utils
 from cuda.core.experimental._device import Device
-from cuda.core.experimental._event import EventOptions
+from cuda.core.experimental._event import Event, EventOptions
 from cuda.core.experimental._launcher import LaunchConfig, launch
 from cuda.core.experimental._linker import Linker, LinkerOptions
 from cuda.core.experimental._module import ObjectCode