v2.1.0 - Improvemetns to DatasetSplitter

[2.1.0] - 2025-07-24

Changed

• (Potential Breaking): We now check explicitly, if classes follow the "rules of tpcp" and simply forward or set parameters
  without modifying them. Before, we just "hoped" that this is the case.
  If you had classes that did not follow these rules, you will now get an error.

Added

• The DatasetSplitter now auto selects a proper splitter based on inputs and attempts to validate if the passed
  splitter supports the features needed.