> (you don't have to strictly follow this form)

**Use case**

Support manually snapshot for Keeper.

**Describe the solution you'd like**

Throught 4lw commands, such as `csnp`.


{
    if (!keeper_dispatcher.isServerActive())
        return SERVER_NOT_ACTIVE_MSG;
    StringBuffer buf;
    const auto & state_machine = keeper_dispatcher.getStateMachine();
    buf << state_machine.getSessionsWithWatchesCount() << " connections watching "
        << state_machine.getWatchedPathsCount() << " paths\n";
    buf << "Total watches:" << state_machine.getTotalWatchesCount() << "\n";
    return buf.str();
}
String WatchCommand::run()
{
    if (!keeper_dispatcher.isServerActive())
        return SERVER_NOT_ACTIVE_MSG;
    StringBuffer buf;
    const auto & state_machine = keeper_dispatcher.getStateMachine();
    state_machine.dumpWatches(buf);
    return buf.str();
}
String WatchByPathCommand::run()