This PR allows campaign creators to incorporate map objects (referred to as Scenery in the code) into their Liberation campaign.
Map objects are defined using white trigger zones created by right clicking on scenery and clicking `assign as...`. Objective groups are defined by creating a blue TriggerZone surrounding the centers of the white trigger zones. The type of objective is determined by the campaign creator, assigning the value of the first property of the blue TriggerZone with the objective type.
Map objects maintain their visually dead state by assigning a `Mission Start` `Scenery Object Dead` trigger to the trigger zone. It is important for the Liberation generated TriggerZone to be as small as possible so that no other scenery is marked dead by DCS.
TriggerZones are hidden during gameplay (DCS behavior. I don't know if it's possible to turn that off.) TriggerZones are visible in the mission editor and mission planner however. If a player is using an older plane, it is important for them to remember where the target is.
In the mission planner, the trigger zones' will be blue or red depending on which faction the map objects belong to.
Inherent Resolve campaign has been modified to integrate scenery objects.
### **Limitations:**
- Objective definitions (Any Blue TriggerZones) in campaign definition cannot overlap.
- Map object deaths in `state.json` is tracking integers. You won't know what died until debriefing.
- No images for the various buildings. In theory it can be done, but an unreasonable amount of work.
- Every blue trigger zone must have a unique name. (If you let DCS auto increment the names this is not a concern.
- No output to screen when scenery object is dead. You can see the building drawn as dead in the F10 map though.
### **Pictures:**
An objective:

How the objective looks once in the mission planner/editor. This objective belongs to the enemy faction:

To avoid confusion, use only the aircraft list for the purchasable
aircraft. This fix also caught a faction's Tu-142 that was not actually
purchasable. Invalid aircraft in the faction aircraft list will now
raise an error.
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1074
https://bugreports.qt.io/browse/PYSIDE-1426
For whatever reason this only shows up in packaged builds for us, and
also the recommended workaround of using a member property rather than a
decorated method does not work for us.
Until PySide2 5.15.3 (or later) is released, we need to use a named
signal for every property we expose.
The `FactoryGroundObject` is just a special case of
`BuildingGroundObject` that we maybe don't actually need. For now it
provides some special case logic for the layout, but this allows any TGO
with the "factory" category to behave as a ground unit source.
Note that the "factory" random strike targets are *not* generated
anymore, so this doesn't affect campaign design currently.
The routes do not need be be recreated each time we create a
`FrontLine`. The front lines follow the convoy routes, which are static.
Add the convoy route data to the `ControlPoint` the way we do for
shipping lanes and have `FrontLine` load the data from there.
A was intended to be the blue point and B was intended to be the red
point. Make this a part of the name so that's clear, and clean up
related code to keep that reliable.
Some of the objective locations for the starting front line are too
aggressive and put opfor at a disadvantage since blue ships might start
so close to their bases.
No sense filling airbases with cheap escorts if we'll never afford the
rest of the package. Filling the airbases with cheap escorts also makes
it impossible to buy the rest of the package when the faction eventually
does have the money since there's nowhere to park the needed aircraft.
https://github.com/dcs-liberation/dcs_liberation/issues/1058
After fulfilling a request we were not exiting the loop, so we'd fulfill
the request for the aircraft at _all_ the bases capable of operating it
until either the bases were full or the budget ran out. In factions like
Iraq 1991 this could cause the budget to be spent on tons of cheap
MiG-19s while never buying the more expensive Su-17s or Su-24s that they
need to actually complete a package.
https://github.com/dcs-liberation/dcs_liberation/issues/1058