Add stub for the IntentModel

CURA-6534

cura/Machines/Models/IntentModel.py

@@ -0,0 +1,17 @@
+# Copyright (c) 2019 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+from typing import Optional
+from PyQt5.QtCore.QObject import QObject
+from UM.Qt.ListModel import ListModel
+from PyQt5.QtCore import Qt
+
+
+class IntentModel(ListModel):
+    def __init__(self, parent: Optional[QObject] = None) -> None:
+        super().__init__(parent)
+
+        self._update()
+
+    def _update(self) -> None:
+        pass