main
merged upstream-master into enh/tree
Tree export fill colors (#33810)
Fix: improve speed of trees with MAE criterion from O(n^2) to O(n log n) (#32100)
ENH Support for monotonic trees with missing values (#27630)
MNT Fix typos found by typos (#33916)
FIX Raise error for categorical features with criterion='absolute_error' (#34594)
FEA Add support for missing values in tree estimators with `criterion="absolute_error"` by greatly simplifying the logic (#32119)