cost_utils.CostDistribution Incorrect Attribute docstring

[Kieran-Fishwick-TfN]

the attributes outlined in the attribute docstring do not exist and are misleading as to how the class init works

[BenTaylor-TfN]

Could you vaguely outline what you'd like to see in the docs please? Current docs are here: https://caftoolkit.readthedocs.io/en/v0.7.3/api/cost_utils.CostDistribution.html#cost_utils.CostDistribution

These are showing up a little weird so some attention is required to tidy these up. A few suggestions from me:

• Revisit whether this class should be a dataclass
• Add a Parameters section to the class docstring.
• Update the class, making it clear that the column names given are for the init only and are otherwise private.