Add AirAssault and Airlift mission types with CTLD support

- Add the new airassault mission type and special flightplans for it
- Add the mission type to airbase and FOB
- Add Layout for the UH-1H
- Add mission type to capable squadrons
- Allow the auto planner to task air assault missions when preconditions are met
- Improve Airlift mission type and improve the flightplan (Stopover and Helo landing)
- Allow Slingload and spawnable crates for airlift
- Rework airsupport to a general missiondata class
- Added Carrier Information to mission data
- Allow to define CTLD specific capabilities in the unit yaml
- Allow inflight preload and fixed wing support for air assault

qt_ui/windows/basemenu/NewUnitTransferDialog.py

@@ -86,7 +86,11 @@ class TransferOptionsPanel(QVBoxLayout):
         super().__init__()
 
         self.source_combo_box = TransferDestinationComboBox(game, origin)
+        self.transport_type = QComboBox()
+        self.transport_type.addItem("Auto", "auto")
+        self.transport_type.addItem("Airlift", "airlift")
         self.addLayout(QLabeledWidget("Destination:", self.source_combo_box))
+        self.addLayout(QLabeledWidget("Requested transport type:", self.transport_type))
 
     @property
     def changed(self):
@@ -96,6 +100,10 @@ class TransferOptionsPanel(QVBoxLayout):
     def current(self) -> ControlPoint:
         return self.source_combo_box.currentData()
 
+    @property
+    def request_airlift(self) -> bool:
+        return self.transport_type.currentData() == "airlift"
+
 
 class TransferControls(QGroupBox):
     def __init__(
@@ -293,6 +301,7 @@ class NewUnitTransferDialog(QDialog):
             origin=self.origin,
             destination=destination,
             units=transfers,
+            request_airflift=self.dest_panel.request_airlift,
         )
         self.game_model.transfer_model.new_transfer(transfer)
         self.close()