Display new + old SEPTA nomenclature

[rachelekm]

The route names of SEPTA's heavy rail (subway/elevated) and light rail (trolley) routes, and certain bus routes are changing and the rollout is expected to be complete in 2026. The SEPTA GTFS repo has been updating in line with changes and "the new nomenclature will be in the route_short_name field, while the old nomenclature remains in the route_long_name. The route_id field will be updated to match the route_short_name field, as is current practice." (see reference here).

Since the route_id matches the route_short_name, we're currently displaying the new route names in directions. Their recommendation is to use the route_long_name followed by the route_short_name in brackets: "Broad Street Line Local [B1] at NRG." This is to assist riders who may be unfamiliar with the new nomenclature.

This will be changing, so this issue is to follow SEPTA GTFS recommendation on rendering new route names at time of implementing.