Export the EuiResizable button

[stratoula]

We have a case where we can't use the ResizableContainer. Check the comment here elastic/kibana#136702 (comment). We need to make many changes on how the unified search component is used across kibana.

We have created our custom solution that works fine but we would like to use the resizable button, in order to not copy paste styles from EUI to kibana.
elastic/kibana#137698 (comment)

[chandlerprall]

After the flyout is converted to emotion (currently in progress) we will be picking up #287 which allows resizing a flyout. This will internally reuse EuiResizableButton and we'll be able to verify it works well on its own, outside of the resizable container, and I think makes the most sense to wait until then to export so we ensure it works as expected.

We talked over zoom about the timeline for this, and unless anyone else disagrees we decided the unified search implementation can wait until we do the flyout work.

[github-actions]

👋 Hi there - this issue hasn't had any activity in 6 months. If the EUI team has not explicitly expressed that this is something on our roadmap, it's unlikely that we'll pick this issue up. We would sincerely appreciate a PR/community contribution if this is something that matters to you! If not, and there is no further activity on this issue for another 6 months (i.e. it's stale for over a year), the issue will be auto-closed.

[cee-chen]

@stratoula The generic EuiResizableButton will be available in EUI's release next Tuesday and then in Kibana main a little after that (so a week or so more of time). Example usage: https://eui.elastic.co/pr_7087/#/layout/resizable-container#custom-resizable-button

[stratoula]

@cee-chen thanx, this is awesome!