Function execute 

pub async fn execute(
    command: &str,
    cwd: &Path,
    shell_path: Option<&str>,
    bin_dir: &Path,
    cancel: CancellationToken,
    on_chunk: impl FnMut(&str),
) -> Result<BashResult, String>

Runs command in cwd with the configured shell, calling on_chunk with each sanitized piece of output, until it exits or cancel fires.