Added QProgressBarWindow.py for displaying progress bars when using iterables....

Added QProgressBarWindow.py for displaying progress bars when using iterables. Updated to version v0.0.3

pyproject.toml

 [project]
 name = "fswidgets"
-version = "0.0.2"
+version = "0.0.3"
 authors = [
   { name="Christoph Schmidt", email="cschmidt.fs@gmail.com" },
 ]

src/fswidgets/__init__.py

 from .LEDIndicatorWidget import LEDIndicatorWidget
 from .PlayPushButton import PlayPushButton
+from .QProgressBarWindow import QProgressBarWindow
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