Documentation: Support nested config

* Add examples to pydantic models.

src/akkudoktoreos/utils/utils.py

@@ -18,6 +18,8 @@ class classproperty(property):
 
 
 class UtilsCommonSettings(SettingsBaseModel):
+    """Utils Configuration."""
+
     pass
 
 

src/akkudoktoreos/utils/visualize.py

@@ -419,7 +419,9 @@ def prepare_visualize(
     start_hour: Optional[int] = 0,
 ) -> None:
     report = VisualizationReport(filename)
-    next_full_hour_date = pendulum.now(report.config.prediction.timezone).start_of("hour").add(hours=1)
+    next_full_hour_date = (
+        pendulum.now(report.config.prediction.timezone).start_of("hour").add(hours=1)
+    )
     # Group 1:
     report.create_line_chart_date(
         next_full_hour_date,  # start_date