Function cargo_run_forward_args 

pub fn cargo_run_forward_args(forwarded: &[String]) -> Vec<String>

Build the cargo argv for forwarding a umbral <cmd> [args...] invocation to the current project’s binary (cargo run -- <cmd> [args...]).

The global umbral scaffolding binary forwards every non-scaffolding subcommand here so umbral dev behaves as cargo run -- dev. The caller runs cargo with these args.