Integrate Jitsi into requests for online labs
Closes #306 (closed)
- change Direction of lab to CommunicationMethod and add "JITSI_MEET"
- generate a Jitsi link for every request with JITSI_MEET CommunicationMethod
- display the link on a TA's request overview and the student's overview once the TA starts processing this request
Edited by Sára Juhošová