dump NGC save

void gc_save_pack_group(const GC_Chat *chat, Bin_Pack *bp)
{
    if (chat->numpeers == 0) {
        LOGGER_ERROR(chat->log, "Failed to pack group: numpeers is 0");
        return;
    }

    bin_pack_array(bp, 7);

    // --------------------------------------
    // HINT: dump chat struct with data
    __builtin_dump_struct(chat, &printf);
    // HINT: dump chat struct with data
    // --------------------------------------

    save_pack_state_values(chat, bp); // 1
    save_pack_state_bin(chat, bp); // 2
    save_pack_topic_info(chat, bp); // 3
    save_pack_mod_list(chat, bp); // 4
    save_pack_keys(chat, bp); // 5
    save_pack_self_info(chat, bp); // 6
    save_pack_saved_peers(chat, bp); // 7
}