EmptyState: Investigate ResizeObserver for proper layout handling

[ffriedl89]

Feature Request

Summary

As part of progressive enhancement, we should investigate the resizeobserver for the empty state component to get rid of the _updateLayout call. Make the component aware of it's container view (hello container queries)

Feature Description

The current problem we have is that the empty-state component is used in multiple parents and "extended" versions of the component by using the dtCustomEmptyState directive and we would need to handle _updateLayout for each scenario.
By using the resize observer we would transfer this logic into the empty state since the component itself is aware of the container's width.

Attachments

[tomheller]

I will look into this one! First thing I noticed that typescript does not ship types for it within lib.dom because it is still marked as EditorsDraft in the spec. See issue microsoft/TypeScript#28502
That should be fixable by declaring it, but the typesaftey will be a bit off.

This is what we get back from the ResizeObserver, if we observe the container element of the DtEmptyState. This seems like we can work with that.