feat: problem discussion

[wdipax]

Problem discussion feature

Scenario: Problem discussion
        Given a person named "Alex"
        And a problem "How to build a decision making system"
        And experts in this problem "Dima", "Carlo"
        When "Alex" starts discussion of the problem
        Then "Dima", "Carlo" can discuss it using "video rooms"
        And the "automatic transcription" of this discussion is saved
        And the "automatic summary" of this discussion is saved
        And the problem discussion becomes finished