Introduce DiscoveredUltimakerCloudPrintersModel

Have a separate model to hold the discovered ultimaker cloud printers.
This model will be used to communicate across the application that new
cloud printers have been found which they weren't seen before.

CURA-7022

cura/Machines/Models/DiscoveredUltimakerCloudPrintersModel.py

@@ -0,0 +1,56 @@
+from typing import Optional, TYPE_CHECKING
+
+from PyQt5.QtCore import QObject, pyqtSlot, Qt
+
+from UM.Qt.ListModel import ListModel
+
+if TYPE_CHECKING:
+    from cura.CuraApplication import CuraApplication
+
+
+class DiscoveredUltimakerCloudPrintersModel(ListModel):
+    IpAddressRole = Qt.UserRole + 1
+    DeviceKeyRole = Qt.UserRole + 2
+    DeviceNameRole = Qt.UserRole + 3
+    DeviceTypeRole = Qt.UserRole + 4
+    DeviceFirmwareVersionRole = Qt.UserRole + 5
+
+    def __init__(self, application: "CuraApplication", parent: Optional["QObject"] = None) -> None:
+        super().__init__(parent)
+
+        self.addRoleName(self.IpAddressRole, "ip_address")
+        self.addRoleName(self.DeviceKeyRole, "key")
+        self.addRoleName(self.DeviceNameRole, "name")
+        self.addRoleName(self.DeviceTypeRole, "machine_type")
+        self.addRoleName(self.DeviceFirmwareVersionRole, "firmware_version")
+
+        self._discovered_ultimaker_cloud_printers_list = []
+        self._application = application
+
+    def addDiscoveredUltimakerCloudPrinter(self, new_devices) -> None:
+        for device in new_devices:
+            self._discovered_ultimaker_cloud_printers_list.append({
+                "ip_address": device.key,
+                "key": device.getId(),
+                "name": device.name,
+                "machine_type": device.printerTypeName,
+                "firmware_version": device.firmwareVersion
+            })
+        self._update()
+
+    @pyqtSlot()
+    def clearDiscoveredUltimakerCloudPrinters(self):
+        self._discovered_ultimaker_cloud_printers_list = []
+        self._update()
+
+    def _update(self):
+        items = []
+
+        for cloud_printer in self._discovered_ultimaker_cloud_printers_list:
+            items.append(cloud_printer)
+
+        # Execute all filters.
+        filtered_items = list(items)
+
+        filtered_items.sort(key = lambda k: k["name"])
+        self.setItems(filtered_items)