Add publisher/server and autoconnect args to BT Monitor

[sea-bass]

This PR adds some extra options to Groot to configure the BT monitor to start with specific address and publisher/server ports, as well as automatically connect by "clicking" the Connect button in the code, if enabled.

Specifically, it lets us run Groot as follows:

ros2 run groot Groot --mode monitor --address 192.168.1.42 --publisher_port 1668 --server_port 1669 --autoconnect

The autoconnect option effectively does the following:

• Increases the timeout for the ZMQ subscriber to 10 seconds
• Triggers a click of the "Connect" button in code
• The above resets the timeout to the default 1 second for users to manually connect/disconnect with the normal timeout

This addresses #133 and #166.

[Timple]

The ports are already optional, could the server ip also be passed? That would be easy to monitor a robot on a dev pc.

[sea-bass]

The ports are already optional, could the server ip also be passed? That would be easy to monitor a robot on a dev pc.

Done!

[kundezui]

The following error occurs during Groot compilation, how to solve it?

/home/qwert/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.cpp: In member function ‘void SidepanelMonitor::on_timer()’:
/home/qwert/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.cpp:61:41: error: no matching function for call to ‘zmq::socket_t::recv(zmq::message_t&)’
while( zmq_subscriber.recv(msg) )
^
In file included from /home/qw/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.h:5:0,
from /home/qw/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.cpp:1:
/usr/include/zmq.hpp:625:23: note: candidate: size_t zmq::socket_t::recv(void*, size_t, int)
inline size_t recv (void *buf, size_t len_, int flags_ = 0)
^~~~
/usr/include/zmq.hpp:625:23: note: candidate expects 3 arguments, 1 provided
/usr/include/zmq.hpp:635:21: note: candidate: bool zmq::socket_t::recv(zmq::message_t*, int)
inline bool recv (message_t msg_, int flags_ = 0)
^~~~
/usr/include/zmq.hpp:635:21: note: no known conversion for argument 1 from ‘zmq::message_t’ to ‘zmq::message_t’
/home/qwert/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.cpp: In member function ‘bool SidepanelMonitor::getTreeFromServer()’:
/home/qwert/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.cpp:149:39: error: ‘zmq::send_flags’ has not been declared
zmq_client.send(request, zmq::send_flags::none);
^~~~~~~~~~
/home/qwert/BehaviorTree.CPP/Groot/bt_editor/sidepanel_monitor.cpp:151:60: error: ‘zmq::recv_flags’ has not been declared
auto bytes_received = zmq_client.recv(reply, zmq::recv_flags::none);
^~~~~~~~~~
CMakeFiles/behavior_tree_editor.dir/build.make:382: recipe for target 'CMakeFiles/behavior_tree_editor.dir/bt_editor/sidepanel_monitor.cpp.o' failed
make[2]: *** [CMakeFiles/behavior_tree_editor.dir/bt_editor/sidepanel_monitor.cpp.o] Error 1
CMakeFiles/Makefile2:109: recipe for target 'CMakeFiles/behavior_tree_editor.dir/all' failed
make[1]: *** [CMakeFiles/behavior_tree_editor.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2