Is your feature request related to a problem?

It is a common error that users pass a Table where a TaggedTable is expected (e.g. to the fit method of models). At the moment this raises an error AttributeError: 'Table' object has no attribute 'features', which neither explains the issue well nor explains how to fix it.

Desired solution

All function that take a TaggedTable as a parameter should raise a custom exception if a Table is passed instead.

• Validation should happen at the start of the execution of the function
• Call the exception UntaggedTableError and add it in safeds.data.tabular.exceptions
• Explain what we mean by "tagging" (marking feature columns and target column of a table)
• Point to the tag_column method of Table to get a TaggedTable

Possible alternatives (optional)

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