Original SCS Trailers in Traffic [1.41.x]

Addition of original SCS trailers to AI traffic.
– Flatbed semi-trailers
– Container semi-trailers
– Lowboy semi-trailers
– Car transporter
– Tipper semi-trailer
– Long tanks
– Cement tank
– Mobile barrier
– New Kenworth T680 and Western Star 49X tractors
– RM Double – curtain, flatbet, dryvan, insulated, reefer
– Triple – curtain, flatbet, dryvan, insulated, reefer
– Separate tractors without semi-trailers