Function parse_cli_args

fn parse_cli_args<I, T>(itr: I) -> Result<Args, (i32, String)>
where
    I: IntoIterator<Item = T>,
    T: Into<OsString> + Clone,

Parse given iterator with our clap Args and handle help/version cases.

Returns: (status code, message) If the status code != 0, the message is an error message.

Cases:

• On successful parse, returns Ok(Args)
• On help/version, returns Err((0, msg))
• On general errors, returns Err((1, formatted_error_msg))