Add highlighting (on search / filter) to DataTable (13)

[tweettypography]

A highlight utility should be created to handle this, with DataTable and Tree as the first consumers

[kwilloughby]

@pixelprodotco

[tweettypography]

I have a working example of this ready in https://github.com/tweettypography/design-system-react/tree/highlight-cell but need to determine what styles should be applied when a highlight match is found.