Expose APIs for displaying date/time

We have a Timestamp component for consistent display of dates and times that we should expose through the SDK. We might also consider a hook that formats dates and times for places were you don't want or cant use the component, eg. times on a chart. 

This will become important when we add a user preference for dates so that plugins show consistent dates and times as console. If I set my user preference to UTC dates, console should show UTC dates everywhere.

AC:

• Expose the Timestamp component inside the SDK. 
• Replace the connect with useSelector hook
• Keep the original component and proxy it to the new one in the SDK

cc jhadvig@redhat.com showeimer