MVU-8 Manure Spreader

The MVU-8 is a reliable manure spreader designed for efficient fieldwork. Converted from FS22 to FS25, this spreader features:

- Price: €7,350
- Capacity: 11,000 to 15,900 liters
- Spreading width: 20 meters

Updates in this version:
- Added rustVehicleShader for a more realistic look
- Fixed compatibility with 'Use Your Tires' mod
- Corrected shader parameters (mvuBelt2, mvuChain1)
- Improved material colors
- Added color picker for customization

If you encounter any issues, please report them!