Function run_command 

pub fn run_command(cmd: Command, description: &str) -> Result<(), BenchError>

Available on crate feature full only.

Runs an external command with consistent error handling.

Captures both stdout and stderr on failure and formats them into an actionable error message.

Arguments

• cmd - The command to execute
• description - Human-readable description of what the command does

Returns

Ok(()) if the command succeeds, or a BenchError with detailed output on failure.