Silverstone Circuit (scenery enhancement for UK-based racetrack)

This add-on enhances the Silverstone Circuit, providing pit buildings, grandstands, fixed bridges, and racetrack-specific barriers for MSFS 2024. Default autogen elements are removed and replaced for a more authentic representation. The racetrack also functions for ground vehicles, though crash detection should be disabled when driving. The scenery appears as an airport in the simulator for technical reasons but is not intended for aviation use.