adding missing license header

pm4py/algo/evaluation/earth_mover_distance/variants/pyemd.py

@@ -1,3 +1,24 @@
+'''
+    PM4Py – A Process Mining Library for Python
+Copyright (C) 2024 Process Intelligence Solutions UG (haftungsbeschränkt)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see this software project's root or
+visit <https://www.gnu.org/licenses/>.
+
+Website: https://processintelligence.solutions
+Contact: [email protected]
+'''
 from typing import Optional, Dict, Any, Union, List
 import numpy as np
 from pm4py.util.regex import SharedObj, get_new_char