Inline version into __init__.py, remove __version__.py

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tpellissier

src/PowerPlatform/Dataverse/__init__.py

@@ -1,6 +1,8 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT license.
 
-from .__version__ import __version__
+from importlib.metadata import version
+
+__version__ = version("PowerPlatform-Dataverse-Client")
 
 __all__ = ["__version__"]