refactor: changed widget_IO.py to widget_io.py for consistency; widget_io.py example excluded from coverage

bec_widgets/qt_utils/widget_io.py

@@ -212,7 +212,7 @@ class WidgetHierarchy:
 
 
 # Example application to demonstrate the usage of the functions
-if __name__ == "__main__":
+if __name__ == "__main__":  # pragma: no cover
     app = QApplication([])
 
     # Create instance of WidgetHierarchy

tests/test_widget_io.py

@@ -8,7 +8,7 @@ from PyQt5.QtWidgets import (
     QSpinBox,
 )
 
-from bec_widgets.qt_utils.widget_IO import WidgetHierarchy
+from bec_widgets.qt_utils.widget_io import WidgetHierarchy
 
 
 @pytest.fixture(scope="function")