Create components for building in-app documentation and help content

[seancolsen]

We need a Tooltip or Help component, akin to Carbon's Tooltip component that will allow us to add documentation and help messages within the UI.

[pavish]

I think it would be better to implement Tooltip as an action, so that we can attach one to any element.

We could have a help component that uses Icon and Tooltip to provide similar functionality as Carbon's tooltip component.

[seancolsen]

Using actions under the hood seems great. We'll need to be mindful about supporting rich text within tooltip content, which might be a little trickier with actions, but still worth going that direction I think.

[pavish]

I don't think tooltips should support rich text. If we need support for rich text or custom components, it should rather be a popover component.

We already have the popper action which can convert any element into a dropdown or a popover, which can be used for such scenarios. We'd also probably want to implement tooltip on top of this.