Function pamoja_kit_deadband 

#[unsafe(no_mangle)]
pub extern "C" fn pamoja_kit_deadband(
    value: f32,
    center: f32,
    width: f32,
) -> f32

Holds a reading at center while it stays within width either side, so small wiggle around a setpoint does not act.

Returns

center while value is within width of it, and otherwise value unchanged.