Add SNCF "KRONO+ GV" TER trains

[MoritzWeber0]

https://www.ter.sncf.com/hauts-de-france/tarifs-et-cartes/billets/High%20Speed%20Option

Some routes are available at high speed at TER prices. on KRONO+ GV lines. These are direct, high-speed TER lines. You will travel on TGV trains capable of travelling at speeds of up to 300km/h. To board, you need the Grande Vitesse option in addition to your TER ticket or season ticket.

We should find out under which conditions FIP is valid on these routes. Is a FIP coupon + Grande Vitesse supplement valid?