add Volume Slider
@NotNull
Adds a volume slider to the addon's configuration.
Return
A configuration entry associated with the created widget.
Parameters
widget Id
Unique identifier for the widget.
label
The label displayed for the slider.
tooltip
The tooltip displayed for the slider.
suffix
The suffix displayed after the value on the slider.
default Value
The default value of the slider.
min
The minimum value for the slider.
max
The maximum value for the slider.