chore: import upstream snapshot with attribution

modules/ml/misc/python/pyopencv_ml.hpp

@@ -0,0 +1,22 @@
+template<>
+bool pyopencv_to(PyObject *obj, CvTermCriteria& dst, const ArgInfo& info)
+{
+    CV_UNUSED(info);
+    if(!obj)
+        return true;
+    return PyArg_ParseTuple(obj, "iid", &dst.type, &dst.max_iter, &dst.epsilon) > 0;
+}
+
+template<>
+bool pyopencv_to(PyObject* obj, CvSlice& r, const ArgInfo& info)
+{
+    CV_UNUSED(info);
+    if(!obj || obj == Py_None)
+        return true;
+    if(PyObject_Size(obj) == 0)
+    {
+        r = CV_WHOLE_SEQ;
+        return true;
+    }
+    return PyArg_ParseTuple(obj, "ii", &r.start_index, &r.end_index) > 0;
+}