Function create_task 

pub(crate) fn create_task(
    qt: &CxxQtThread<Sioul>,
    shared: &Arc<Shared>,
    edit: &TaskEdit,
    list: &str,
) -> Result<String, String>

A task in a list kept on this computer only, made the first time with list_name: what must never reach a server (health errands). Returns its UID. A task made in a list (“account/id”); returns its UID.