344 ML model and CLI improvements

[nmaarnio]

This PR concerns both CLI and ML tools.

CLI

• Added enum getter/unpacker (was required for list enums to be interpreted correctly but applied to all to be sure)
• All CLI functions with enum parameters use the above getter
• Harmonized how enum parameters are defined for CLI functions (now always Annotated[EnumParameterType, typer.Option(case_sensitive=False) = EnumParameterType.some_default_value)

ML modeling

• Added links to Sklearn and Keras docs where relevant
• Added criterion parameter to Random Forest models
• Added raster grid check to ML model data preparation and renamed training rasters -> feature rasters for clarity (since some call labels as training data)

[RichardScottOZ]

Yes, sensible renaming.

[Mtk112]

Looks good to me!