Re-work how position-init and ATC-manager work together to do
parking assignment and fallback (when the parking is unavailable).
Improve the logic for the reposition case, and teach ATC-manager about
reposition explicitly.
When the parking is unavailable, explicitly fall back to best-runway
selection in finalizePosition.
Add many additional position-init tests, to cover all of this.
This is a clean up commit prior to the subsystem API standardisation to simplify
the diffs. It includes all SGSubsystem and SGSubsystemGroup derived classes.
- remove some global headers from AI headers, to avoid pollution
- change how ATC owns the ‘player’ FGAIAircraft so reset works
- ensure AIAircraft controllers are cleared on unbind for reset
- Change AIFlightPlan::waypoint into an independent class FGAIWaypoint
- Don't update leg count until the aircraft has passed the last waypoint that was created by the corresponding leg
- Clear ground network rendering for controllers that are no longer active.
* Added an AIAircraft that is shadowing the user aircraft's behavior, in terms of AI / ATC interactions
* Set up a shadow AI FlightPlan that is used for tracking the user's aircraft.
* Started transfering the ATC infrastructure to be driven by it's own subsystem
* Changed the bahavior of the "'" key so that it is no longer driven by ATCDCL, but it now triggered by the new subsystem based ATC module.
