[Dashboard]: Add live-on logs display to dashboard

[ApusBerliozi]

Summary

Right now session's logs uploads only after whole calculation is complete. I think it would be more convenient for users to see a live-on process, like it's happening in terminal. Also, it would be cool to add interaction options for it (like pause session, create snapshot of current model's state) and so on. As for current logs - they will be accessible in the separate tab, and I'm thinking on adding an opportunity to download them

Scope

• Add a live-on terminal into a dashboard, where logs displayed as they called, not after calculation
• Add a separate tab for logs, which can be checked as whole after everything is done (like it's working right now)
• Add a opportunity to download log files
• Update docs and README
• (Optional) Add an option to pause session, have a snapshot of current state, etc

Acceptance Criteria

• Users can observe progress as ML-model is learning
• Users can review log file as whole in a separate tab AFTER calculation is done
• Users can download log files
• Docs and README updated
• (Optional) Users can interact with session, pause it, have a snapshot, etc.

Parent Issue

#98