Refactor Templates to Layouts, Review and Cleanup

- Fix tgogenerator
- Fix UI for ForceGroup and Layouts
- Fix ammo depot handling
- Split bigger files in smaller meaningful files (TGO, layouts, forces)
- Renamed Template to Layout
- Renamed GroundGroup to TheaterGroup and GroundUnit to TheaterUnit
- Reorganize Layouts and UnitGroups to a ArmedForces class and ForceGroup similar to the AirWing and Squadron
- Reworded the UnitClass, GroupRole, GroupTask (adopted to PEP8) and reworked the connection from Role and Task
- added comments
- added missing unit classes
- added temp workaround for missing classes
- add repariable property to TheaterUnit
- Review and Cleanup

Added serialization for loaded templates

Loading the templates from the .miz files takes a lot of computation time and in the future there will be more templates added to the system. Therefore a local pickle serialization for the loaded templates was re-added:
- The pickle will be created the first time the TemplateLoader will be accessed
- Pickle is stored in Liberation SaveDir
- Added UI option to (re-)import templates

game/dcs/aircrafttype.py

@@ -1,11 +1,10 @@
 from __future__ import annotations
 
 import logging
-from collections import defaultdict
 from dataclasses import dataclass
 from functools import cached_property
 from pathlib import Path
-from typing import Any, ClassVar, Iterator, Optional, TYPE_CHECKING, Type
+from typing import Any, Iterator, Optional, TYPE_CHECKING, Type
 
 import yaml
 from dcs.helicopters import helicopter_map
@@ -397,5 +396,5 @@ class AircraftType(UnitType[Type[FlyingType]]):
                 channel_namer=radio_config.channel_namer,
                 kneeboard_units=units,
                 utc_kneeboard=data.get("utc_kneeboard", False),
-                unit_class=UnitClass.Plane,
+                unit_class=UnitClass.PLANE,
             )