feat: adding openapi spect generation to the frontend client aas well as to fast api. Broke API out into different routes

mta_api_client/stop.py

@@ -0,0 +1,7 @@
+from datetime import datetime
+from google.transit import gtfs_realtime_pb2
+from math import trunc
+
+
+def trip_arrival_in_minutes(stop_time_update: gtfs_realtime_pb2.TripUpdate):
+    return trunc(((datetime.fromtimestamp(stop_time_update.arrival.time) - datetime.now()).total_seconds()) / 60)