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

gen/flights/waypointbuilder.py

@@ -19,6 +19,7 @@ from game.theater import (
     MissionTarget,
     OffMapSpawn,
     TheaterGroundObject,
+    TheaterUnit,
 )
 from game.utils import Distance, meters, nautical_miles
 from game.ato.flightwaypointtype import FlightWaypointType
@@ -28,13 +29,13 @@ if TYPE_CHECKING:
     from game.ato.flight import Flight
     from game.coalition import Coalition
     from game.transfers import MultiGroupTransport
-    from game.theater.theatergroundobject import GroundUnit, GroundGroup
+    from game.theater.theatergroup import TheaterGroup
 
 
 @dataclass(frozen=True)
 class StrikeTarget:
     name: str
-    target: Union[TheaterGroundObject, GroundGroup, GroundUnit, MultiGroupTransport]
+    target: Union[TheaterGroundObject, TheaterGroup, TheaterUnit, MultiGroupTransport]
 
 
 class WaypointBuilder: