[EUI toolbar button component][shared-ux]

[rshen91]

In working on elastic/kibana#124372, I'm opening this issue to start a discussion if this component should be taken into EUI vs migration into the shared_ux directory.

[elizabetdev]

Hi @rshen91,

I'm looking at the storybook preview, are these the same buttons used in Lens?

In the past, we started a discussion about adding toolbar buttons in EUI:

• Add toolbar button styles #4730

But it was an early discussion and we need a better spec to know what we should build. At the time, we agreed that @MichaelMarcialis is going to pass us the design spec and after that, we can build the new component.

So I think for now the component should live in the shared-ux and soon we let you know the plans for the EUI toolbar button component.

CC / @cchaos @MichaelMarcialis @ryankeairns @chandlerprall

[chandlerprall]

We would also want to ensure proper aria roles/labels exist, and include a full toolbar component (see #3500)

[cchaos]

I'm going to move this to an actual discussion so to better track talking points. This is a good example of how to communicate theses re-used/EUI-overridden components could surface back up to EUI.