feat: Log Diffing

[lcottercertinia]

Is your feature request related to a problem?

It would be good to be able to compare 2 logs, sort of a before and after scenario. load two logs and show their timelines above each other where we line it up so the times are at the same point etc

Describe the solution you'd like

This is more of an epic and needs though and more ideas adding. For example, do we want to also compare on the analysis and db tabs?