Allow users to see cursor of others in same remote session

[pogi7]

Checklist before submitting a feature request

• [x] I have reviewed CONTRIBUTING.md document
• [x] I have done a quick search on the issue tracker to check if the feature request is not redundant

Is your feature request related to a problem? If yes, describe the problem

I am annoyed that I can't tell visually that another user has logged into the same remote session as me.

Describe the desired feature

I want to be able to see other users' cursors who have logged into the same remote session as me.

Additional context

An example from Figma

[pogi7]

Potential architecture for allowing users to see cursor of others in same remote session.

[pogi7]

For potential in-memory DB, Redis is a good DB to use https://redis.io/