Function run 

pub fn run(
    paths: Paths,
    config: Config,
    config_path: PathBuf,
    sources: Vec<Box<dyn ReviewSource>>,
    all: bool,
) -> Result<()>

Run the TUI until the user quits. Blocks the current thread; call from within a Tokio runtime (needed for the open-locally hotkey, which drives sync::fetch_local to completion synchronously).