Function run 

pub async fn run(
    ip: Option<Ipv4Addr>,
    index: Option<usize>,
    name: String,
    iface: Option<IfaceSelector>,
    json: bool,
) -> Result<()>

Execute a GenApi <Command> feature.

Separate from set because a command has no value: set --name UserSetLoad --value 1 worked, since Camera::set dispatches commands and discards the value, but nothing said so and the required --value reads like a mistake (issue #121).

There is deliberately no read-back. Camera::get on a Command returns a type error, and GenICam’s pIsDone polling is not implemented — so the only honest report is that the write was acknowledged.