Function generate_golden 

pub fn generate_golden(
    circuit_path: impl AsRef<Path>,
    signals: &[(&str, Vec<f64>)],
    output_dir: impl AsRef<Path>,
    config: SpiceConfig,
) -> Result<(), SpiceError>

Generate golden references for a test circuit.

This is a convenience function that runs SPICE for multiple signals and saves the outputs as .npy files.