Fixed first start configuration load and add city model in add customer

lib/PyqcrmDataRoles.py

@@ -0,0 +1,8 @@
+# This Python file uses the following encoding: utf-8
+
+from PySide6.QtCore import Qt
+from enum import IntEnum
+
+class PyqcrmDataRoles(IntEnum):
+    CITY_ROLE = Qt.UserRole + 1
+