Ensure the command return status is passed through the command line

Example:
The exit status of 1 from "openai" is not being propagated up to the final exit status seen in the terminal.
```
$ ml transcribe openai /Users/tt/COMP4560/en.mp3
openai transcribe: File not found: /Users/tt/COMP4560/en.mp3
$ echo $?                                               
0
```


