Add support for LiblineaR binary logistic regression models#243
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Adds tidypredict support for binary logistic regression models fitted with
LiblineaR::LiblineaR(), includinglogistic_reg()parsnip models using the"LiblineaR"engine (#232). The parser reuses the existing linear-model machinery with a logit link, so the fit expression, SQL translation, and orbital paths all work, and predictions follow the glm convention of returning the probability of the second factor level. Multiclass models are out of scope and raise a clear error.