No Empty Runs - skip unneeded stops

Adds a "No Empty Runs" card to the line window. Turn it on per line. - A vehicle goes only to stops where something on board gets off, or where cargo or passengers are waiting for the line and there is room for them. - Several loading stops and one unloading stop: an empty vehicle goes straight to the stop where cargo is actually waiting (cargo in the factory or warehouse at the stop counts, only for cargo the line loads there and the vehicle can carry). - Nothing waiting anywhere: an empty vehicle heads to the nearest loading stop instead of touring unloading stops. - Works for passenger lines too: a bus skips stops where nobody gets off and nobody is waiting. - Skipped stops are passed without braking. Optional per line: "Keep the line's route" - the skip follows the line's waypoints, drives past skipped street stops (e.g. stays on bus lanes) and passes skipped stations and factory stations on the street outside, without entering them. - "Don't wait to load": skip loading stops only when the vehicle is full, or whenever it carries anything (unloading first). - Per stop: Auto, Unload only, or Load only. - Optional: switch it on automatically for every new line (mod settings). How it works: Transport Fever 3 does not let mods choose a vehicle's next stop directly, so for a skip the mod briefly moves the vehicle to a temporary helper line (name ending in " ~SS") that has only the target stop (plus the line's route as waypoints when "Keep the line's route" is on), and returns it to its own line shortly before arrival. Cargo stays on board. Helper lines exist only during a skip and are removed automatically. Works for road, rail, tram, air and helicopter lines; ships follow their line normally. Lines need at least 3 stops. Safe to add to existing saves. Languages (9): English, Polish, German, French, Spanish, Russian, Portuguese (Brazil), Italian, Chinese (Simplified). Other languages fall back to English. Changelog 1.2.0 - Tested with trains, aircraft and helicopters (trams use the same road logic). Aircraft return to their line about 4 km before the airport, so they land normally without a go-around. - Ships are no longer rerouted - the game does not let the mod send a ship back to its line with the right next stop, so ships sailed in circles. They now simply follow their line. - Helper lines no longer create game notifications (no sound, nothing in the notification history). 1.1.0 - Stops are skipped when nothing is waiting there (cargo and passengers), not only when the vehicle is full. - Passenger lines supported. - New line option "Keep the line's route": the skip follows the line's waypoints, drives past skipped street stops and passes skipped stations (also factory stations) on the street outside the entrance, leaving the starting station the same way as the original route. - Cargo waiting in factories and warehouses at a stop is taken into account. - An empty vehicle with nothing waiting anywhere heads to the nearest loading stop. - Stop roles: Auto / Unload only / Load only ("Always stop" becomes "Load only" in existing saves). - New mod setting: enable on new lines. - Removed the forced departure (it did not save any time) and the statistics. 1.0.1 - Hidden the game's false "too few stations" and "cargo cannot be unloaded anywhere" warnings for the temporary helper lines (popups, HUD icons, line window, line manager).