MiR: Join execution loop

[b-Tomas]

Description

Join the execution loop of the connector, allowing it to be stopped gracefully.

Requires inorbit-ai/inorbit-connector-python#12

Demo

Console output:

...
INFO:inorbit_connector.connector:Updating map 20f762ff-5e0a-11ee-abc8-0001299981c4 with new pose.
^CINFO:inorbit_mir_connector.mir100_start:Received SIGINT, stopping connector
INFO:inorbit_connector.connector:Cleaning up connector missions
INFO:inorbit_connector.connector:Deleting missions group b6a3a55c-26a6-4a74-b6cd-1955851c1f03
INFO:inorbit_connector.connector:Updating map 20f762ff-5e0a-11ee-abc8-0001299981c4 with new pose.
INFO:RobotSession:Ending robot session
INFO:RobotSession:Publishing status 0. ret = (0, 26).
INFO:RobotSession:Robot status '0' published: 1.
INFO:RobotSession:Waiting for MQTT connection state '_is_disconnected' ...
INFO:RobotSession:Disconnected from MQTT broker