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

resources/units/aircraft/SA342Mistral.yaml

@@ -1,3 +1,4 @@
+class: Helicopter
 carrier_capable: true
 description: "The SA342 Gazelle is a light scout/attack and transport helicopter.\
   \ It was introduced in 1968 as a result of cooperation between A\xE9rospatiale and\
@@ -9,6 +10,8 @@ description: "The SA342 Gazelle is a light scout/attack and transport helicopter
   \ which features the famous Fenestron tail rotor."
 introduced: 1977
 lha_capable: true
+cabin_size: 2
+can_carry_crates: false
 manufacturer: "A\xE9rospatiale"
 origin: France
 price: 8