[Feature] Predefined capacity for different operation modes

[Phil061995]

Changeable and predefined capacity based on the operation mode (e.g. LVO at EDDM). Within the command line this option could be activated by ".vacdm eddm lvo" and is valid for e.g. 3 hours until it will end automatically. A warning is send to the Master that it will end within the next few minutes.

[Frenkii]

We should discuss whether the capacity reduction should take place inside the plugin or inside the admin frontend (if we have something like that in the future)
Anyhow, I suggest extending the airports→runway model with, i.e.

interface AirportCapacity {
  rwy_designator: string;
  capacity: number;
  alias: string;
          tempCapacity: number;
          tempCapacityEndTime: Date;
  
}

We need a temporary capacity option.