step 7: harden docs and prepare beta

src/dpg_gauges/__init__.py

@@ -35,6 +35,8 @@ from .types import (
     ThresholdBand,
 )
 
+__version__ = "0.1.0b1"
+
 __all__ = [
     "configure",
     "GaugeTheme",
@@ -67,8 +69,10 @@ __all__ = [
     "set_show",
     "delete_gauge",
     "get_gauge_debug_state",
+    "__version__",
 ]
 
 
 def main() -> None:
+    """Print a short message for the package console script."""
     print("dpg-gauges is a library package; import dpg_gauges to use it.")