Manure Heap Fix FS25

Adds temperature- and wind-dependent steam to manure heaps and vehicles loaded with manure. A change in the amount of manure activates the effect for ten in-game minutes; it then gradually fades out over five in-game minutes. Each player can enable or disable the steam effect separately in the General Settings. In addition, the mod prevents negative fill levels in manure heaps when they are completely emptied manually.