UI: Improve tabs component, more type correct, allow for FC as title

[ndelangen]

This targets release/7.2 to not disrupt the 7.1 release.

What I did

• improve the Tabs component to have better types
• the title can be a FC now
• improve the Addon interface to accept the FC as title as well
• split the Addon interface into Addon_BaseType for future use

How to test

• build should succeed
• yarn check should pass
• no UI changes detected by chromatic (except for new stories)
• there should be no perf changes in anything related to tabs or addons

Checklist

• Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests)
• Make sure to add/update documentation regarding your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Maintainers

• If this PR should be tested against many or all sandboxes,
  make sure to add the ci:merged or ci:daily GH label to it.
• Make sure this PR contains one of the labels below.

["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]

[JReinhold]

Awesome work, I've left a few comments.