Add missing exports for theme packages

[jpzwarte]

Fixes #2119

[changeset-bot]

🦋 Changeset detected

Latest commit: c51b583

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 14 packages

Name	Type
@sl-design-system/tree	Patch
@sl-design-system/editorial-suite	Patch
@sl-design-system/my-digital-book	Patch
@sl-design-system/sanoma-learning	Patch
@sl-design-system/itslearning	Patch
@sl-design-system/bingel-int	Patch
@sl-design-system/bingel-dc	Patch
@sl-design-system/clickedu	Patch
@sl-design-system/magister	Patch
@sl-design-system/kampus	Patch
@sl-design-system/neon	Patch
@sl-design-system/teas	Patch
@sl-design-system/max	Patch
@sl-design-system/tig	Patch

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