[USA] Add BART (San Francisco)

[Manu1400]

// Wikipédia: https://fr.wikipedia.org/wiki/Bay_Area_Rapid_Transit

doc :

• https://www.postman.com/postman/workspace/postman-team-collections/request/5922408-0dd205ac-80b7-4599-acde-2abba5b0c413
• or http://api.bart.gov/docs/bsa/elev.aspx

ie: http://api.bart.gov/api/bsa.aspx?cmd=elev&key=MW9S-E7SL-26DU-VV8V&json=y =>

{"?xml":{"@version":"1.0","@encoding":"utf-8"},"root":{"@id":"1","uri":{"#cdata-section":"http://api.bart.gov/api/bsa.aspx?cmd=elev&json=y"},"date":"09/29/2021","time":"10:17:20 AM PDT","bsa":[{"@id":"09291017","station":"BART","type":"ELEVATOR","description":{"#cdata-section":"There are 3 elevators out of service at this time: COLS: Concourse/ParkingLot - Tunnel; DALY: Parking Lot/Station - TunnelStation/Parking Lot - Tunnel"},"sms_text":{"#cdata-section":"3 elevs out of svc: COLS: CONCourse/parkinglot - tunnel; DALY: parking lot/stn - tunnelstn/parking lot - tunnel"},"posted":"","expires":""}],"message":""}}