skctl xray should show diffs of resource changes

[drmorr0]

Description

Right now, skctl xray can show the timeline of events in a trace, but it's hard to tell how those events have changed over time, because each event/object is just stored as the entire k8s manifest. We should make it easier to tell what things have changed, either by highlighting the changed portions, or (possibly) by just displaying a json patch needed to transform one into the next (maybe there is a toggle that lets you switch between them).