feat(roadtrip): a flight, train or ferry booking seams the drive at its terminals

The road trip routed straight from one stop to the next, whatever stood
between them: a flight booked for the afternoon became an eight-hour drive
on the map, with the hotel reached by road from a town the traveller had
flown out of (issue #2428). The day plan has treated such bookings as
carriers for a while, and the drive now reads them the same way.

A flight, train, ferry, cruise or bus with located terminals is a seam. Its
two terminals are seated among the day's stops where the day plan lists the
booking, as stops of their own: no number, no stay, no kind, not draggable,
and an id below every assignment and every automatic night, because they
stand for none. The road ends at the departure terminal and starts again at
the arrival one; the leg between them is the ride, in the booking's own
mode, with the timetable's minutes and no distance, and no router is ever
asked for it. The departure terminal is pinned a check-in ahead of the
timetable and left on the timetable's minute, so a drive that cannot make
the airport in time is late the way a missed pin is. A ride that lands on a
later day seats its arrival at the start of that day; with connected days
the join between the two is the ride, and with daily travel times set the
ride runs on the booking's clock through the night, with no day end placed
on a flight.

The map draws the ride as the booking's own arc, the one the day plan
already draws, beside the roads. The day's distance and driving time count
the roads only, the range budget spends nothing on a ride, and after one the
car cannot take it starts afresh. The corridor search leaves the ride out
and drops a hit under the flight path; a via cannot be filed against a
terminal, and other ways of driving are offered for the road into a
departure terminal only. The server plan reads the same three tables and
seats the same stops, so calculate_roadtrip answers the same as the rail.

Closes #2428

shared/src/i18n/ar/roadtrip.ts

@@ -264,5 +264,9 @@ const roadtrip: TranslationStrings = {
   'roadtrip.stay.releaseBody': 'ستُزال ليلة المبيت في "{name}". تبقى المحطة على الرحلة كاستراحة.',
   'roadtrip.stay.releaseBookedBody': 'ستُزال ليلة المبيت في "{name}" مع الحجز "{booking}" وأي مصروف مرتبط به. تبقى المحطة على الرحلة كاستراحة.',
   'roadtrip.stay.releaseAction': 'اجعلها استراحة',
+  'roadtrip.ride.departure': 'المغادرة {time}',
+  'roadtrip.ride.arrival': 'الوصول {time}',
+  'roadtrip.ride.open': 'فتح الحجز',
+  'roadtrip.ride.beThere': 'الحضور قبل {time}',
 };
 export default roadtrip;