Add new Abstract machine stack type. This represents a type of printers (ultimaker_s3 etc).

These are created whenever a cloud printer of a new printer type is added.

CURA-9277

Co-authored-by: casperlamboo <c.lamboo@ultimaker.com>

cura/Settings/AbstractMachine.py

@@ -0,0 +1,16 @@
+from typing import List
+
+from cura.Settings.GlobalStack import GlobalStack
+
+
+class AbstractMachine(GlobalStack):
+    """ Behaves as a type of machine, represents multiple machines of the same type """
+
+    def __init__(self):
+        super(self)
+        self.setMetaDataEntry("type", "abstract_machine")
+
+    def getMachinesOfType(self) -> List[GlobalStack]:
+        pass
+
+