Added Cython modules

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61.0"]
+requires = ["setuptools>=61.0", "numpy", "Cython"]
 build-backend = "setuptools.build_meta"
 
 [project]

setup.py

@@ -0,0 +1,15 @@
+from setuptools import setup, Extension
+import numpy
+
+setup_args = dict(
+    ext_modules = [
+        Extension(
+            "cut_finder",
+            ["mercury/explainability/explainers/_tree_splitters/cut_finder.pyx"],
+            extra_compile_args=['-fopenmp'],
+            extra_link_args=['-fopenmp'],
+            include_dirs=[numpy.get_include()]
+        )
+    ]
+)
+setup(**setup_args)