[shared-ux] Migrate solution toolbar button

[rshen91]

Summary

Breaking #124372 into smaller PRs.

This PR adds mdx documentation, a storybook example and tests for the primary button within the solution toolbar. This PR is intended to be a starting point for future PRs to build out other solution toolbar components.

The primary button component has been edited to contain the required prop of a label and optional props of onClick and iconType. IconSide has been set to the left based on current implementations.

Current implementations:

• presentation_utils add from library and popover

Added storybook example:

Checklist

Delete any items that are not applicable to this PR.

• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• Any UI touched in this PR is usable by keyboard only (learn more about keyboard accessibility)
• Any UI touched in this PR does not create any new axe failures (run axe in browser: FF, Chrome)
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)
• This was checked for cross-browser compatibility

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[rshen91]

@elasticmachine merge upstream

[majagrubic]

Looks good, two minor comments

[clintandrewhall]

Great work!

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 5b14eaa
• Storybooks Preview
• Webpack Bundle Analyzer

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
sharedUX	47	49	+2

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
sharedUX	100.5KB	100.8KB	+326.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
sharedUX	4.7KB	4.8KB	+115.0B

Unknown metric groups

async chunk count

id	before	after	diff
sharedUX	3	4	+1

History

• 💔 Build #27529 failed 1514031
• 💚 Build #27454 succeeded 82766a6
• 💚 Build #27403 succeeded 8f735d5
• 💚 Build #26632 succeeded aac8798
• 💚 Build #26580 succeeded 22e1033
• 💔 Build #26543 failed 8341f0d

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream