Bonjour RATP

build_bonjour_ratp_itinerary_urlGenerates a deep-link URL to Bonjour RATP for transit routes, itineraries, and directions in Paris / Île-de-France (IDF). USE WHEN user asks in English or French for: "itinerary", "route", "directions", "how to go to", "itinéraire", "trajet", "comment aller à", "temps de parcours", "métro", "RER", "bus", "vélo", "marche". Covers Paris, suburbs, stations (gares, arrêts, aéroports CDG/Orly), and POIs. Returns the direct clickable URL to the itinerary result.