Add support for unique username and highlight color for all user in RTC session

[Ram81]

As per the current implementation of Real Time Collaboration feature all the anonymous user have same name Kafka and the highlighting color is assigned randomly for each new user that joins RTC session. Support for maintaining global context of usernames and associated highlighting color needs to be added to ensure each anonymous user has unique name and unique highlighting color.

[yashdusing]

Is the RTC feature implemented ? If so, I'd like to give this screenshot error a shot since this could prove to be a good learning experience for handling RTC features.

[Ram81]

@yashdusing RTC feature is implemented, you can have a look at RTC-Feature branch for the code. This issue is not for an error it is a feature update. Let me know if you need any help with codebase.