Implement basic UI for debugger artifact browser

[agoldis]

@vCaisim let's try to mimic the layout of the Playwright trace viewer - the steps, DOM content, and extra details on the right.

1. A list of cypress steps (as appears in the sandbox POC)
2. Step Details Tab with all the data we've captured about step
3. Network Tab
4. ...shows all the relevant network calls for the current step
5. Show all the details for the selected network call