fix: exclude tests/ from built wheel (#509)

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

Author: shbatm

setup.py

@@ -17,7 +17,7 @@
     description="Python module to talk to ISY994 from UDI.",
     long_description=README,
     long_description_content_type="text/markdown",
-    packages=find_packages(),
+    packages=find_packages(exclude=["tests", "tests.*"]),
     zip_safe=False,
     include_package_data=True,
     platforms="any",