Improve LabelPlot Parameter

[sorlob]

The following Parameter are insufficiently documented

vitabel.typing.LabelPlotType: TypeAlias = Literal['scatter', 'vline', 'combined']

vitabel.typing.LabelPlotVLineTextSource: TypeAlias = Literal['data', 'text_data', 'combined', 'disabled']

vitabel.typing.IntervalLabelPlotType: TypeAlias = Literal['box', 'hline', 'combined']

vitabel.typing.LabelAnnotationPresetType: TypeAlias = Literal['timestamp', 'numerical', 'textual', 'combined']