[IR] SNCF french Pack for immersive railroading

Locomotives : 

・ PLM - 220 C (4-4-0) with three liveries : Green (C145), Black (C61), Green no lining (C145) :
- Driver widgets, Aero and lights (on/off) 
- Air pump sound on the bell keybind
- Firebox door

・SNCF CC72000:
- Fixed the lights issue and cleared the switches for the headlights
- Added the exhaust particles

Tenders : 

・ PLM - 220C tender (20m3) with three liveries : Green (C145), Black (C61), Green no lining (C145)
- Footplate

Stock : 

・DP 26000 Brake Van (3 axel) : 
- Red lights toggleable (on/off by clicking on the mounts)