Function lumen_query 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn lumen_query(
    selector: *const c_char,
    out_list: *mut LumenNodeList,
) -> LumenStatus

Run a CSS selector against the current DOM snapshot, writing the matches (document order) into *out_list. On success the caller owns the list and must release it with lumen_nodelist_free. A bad selector returns LumenStatus::ErrCss. Thread-safe.