BFS F.R.I.E.S Compat UH60 H47

Changes: - Board F.R.I.E.S now picks the rope by where you board. UH-60: the left door and the left rope point board the left rope, the right ones the right rope, and the prompts read "Board F.R.I.E.S (left)" and "(right)". MH-47G: the two rope points board their own side. Before this every rider took the same rope: the fast-rope system boards whichever anchor is nearest the rider, and on both cabins that was always the same one. - MH-47G ramp boarding alternates ropes: each rider goes to the rope with fewer people on it, and when both are equal to the other side from last time, so a stick boards left, right, left, right. - Added "Recover F.R.I.E.S ropers": pulls every rider on the ropes back into a free cargo seat, for a rider who can no longer descend or climb. Shown only while someone is on a rope, on the UH-60 landing light switch and cabin prompts and on the MH-47G engine lever panel, ramp lever and jump lights button. Retract becomes available once the ropes are clear; the fast-rope system refuses to retract while anyone is counted on a rope, so retract and redeploy never cleared a stuck rider. - Technical: two small script extensions of the fast-rope system (a rope choice hook and the recovery transfer without the climb-up distance limit); no change to rope placement or dependencies.