Add coffee control node

Author: kPatch

coffee_ws/README.md

@@ -103,6 +103,14 @@ sudo docker run -it --rm -v /dev:/dev --privileged --net=host microros/micro-ros
 ros2 run coffee_joystick joystick_control
 ```
 
+## Launching Coffee Control Node
+```
+ros2 run coffee_control coffee_control_node --ros-args -p mac_address:=<your_machine_mac>
+```
+
+Or use the launch file (recommended)
+ros2 launch coffee_control coffee_control.launch.py  # Uses default MAC: 9C:95:6E:61:B6:2C
+ros2 launch coffee_control coffee_control.launch.py mac_address:=<your_machine_mac>
 
 ## Launching Dialogue System