Simplify TimeSeries

[lars-reimann]

Is your feature request related to a problem?

In #680, we've drastically simplified the former TaggedTable (now TabularDataset). Similarly, TimeSeries should be simplified, which currently duplicates a lot of things one can already do with a Table.

Desired solution

• Create a new TimeSeriesDataset class in safeds.data.labeled.containers. It should be created from a Table or a Mapping[str, Sequence[Any]] (see TabularDataset) by specifying
  • time_name
  • target_name
  • extra_names
• Remove the current TimeSeries class completely. Instead, integrate the limited additional functionality to work with temporal data (e.g. plots) into the normal Table class.
• Add a to_time_series_dataset method to Table, as an additional means to create a TimeSeriesDataset

This greatly improves maintainability. Moreover, then there's only one way to manipulate tabular data.

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