[ENH] Add Differentiable Transformer and Exact PDFs for TargetTransformRegressor

.gitignore

@@ -41,4 +41,5 @@ sdist/*
 docs/api/*
 docs/_build/*
 cover/*
+.coverage.*
 MANIFEST

skpro/compose/__init__.py

@@ -0,0 +1,8 @@
+"""Transformers for skpro pipelines."""
+
+from skpro.compose._transformer import (
+    BaseDifferentiableTransformer,
+    DifferentiableTransformer,
+)
+
+__all__ = ["BaseDifferentiableTransformer", "DifferentiableTransformer"]