Ability to plan tanker recovery for strike like flights (#1729)

* Initial refueling definitions.

* Adding refuel definitions.

* Initial functionality changes

* Regenerate package when adding refueling flight.

* Recursively change package waypoint.

* Fix mypy errors.

* Regenerate flight plans when tanker is added to package.

* Give tanker better starting position on package recovery.

* Add TOT calculation for refueling waypoint.

* Timing changes to Strike split point and Refueling start time.

* Add correct waypoint builder for refuel in tarcap and sweep.  Remove restrict afterburner on refuel point.

* Always generate a refuel point for a package.

* Less arbitrary altitude in Refuel track start time calculation.

* Refueling waypoint no longer optional.

* Fix mypy gen error.

* Better discrimination of which tanker flight plan to make.

* Remove refuel tot calculations.

* Remove package regeneration on tanker flight addition.

game/flightplan/refuelzonegeometry.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from dcs import Point
+
+if TYPE_CHECKING:
+    from game.coalition import Coalition
+
+
+class RefuelZoneGeometry:
+    def __init__(
+        self,
+        package_home: Point,
+        join: Point,
+        coalition: Coalition,
+    ) -> None:
+        self.package_home = package_home
+        self.join = join
+        self.coalition = coalition
+
+    def find_best_refuel_point(self) -> Point:
+        # Do simple at first.
+        # TODO: Consider threats.
+        distance = 0.75 * self.package_home.distance_to_point(self.join)
+        heading = self.package_home.heading_between_point(self.join)
+        return self.package_home.point_from_heading(heading, distance)