Pre-feature request: suppress unused variable warning for unit-type arguments

Churn on introducing args would be reduced even further if you uniformly pattern matched the argument struct in every subcommand whether it has fields or not

use clap::Args;
use super::CommandError;

#[derive(Clone, Debug, Args)]
pub struct SubcommandWithNoOptionsArgs {}

pub fn subcommand_with_no_options_run(args: SubcommandWithNoOptionsArgs)
  -> Result<(), CommandError> {
    let SubcommandwithNoOptionsArgs { } = args;
    Ok(())
}