Save recording and screenshots for web-browser demos

[areibman]

🚀 Feature Request

Several agents navigate the web take screenshots and videos. We'd like to be able to save and store these screenshots in the AgentOps dashboard.

In particular, we should make it easy to handle the format MultiON provides: https://github.com/MULTI-ON/api

💡 Got a brilliant idea?
This feature has two necessary capabilities:

1. Add a "screenshot" param to the Event class.
2. Add a "recording" param to the Session that allows you to add a video to the session before the session ends. This can either be through an update method or directly updated the class attribute

🎉 Describe the solution you'd like
Please refer to MultiON's API for how they save screenshot and recording data. This is all generally speaking provided by Playwright.