fix(themes): wrong package json export

[matthprost]

Summary

Type

• Bug

Summarise concisely:

What is expected?

Forgot the import in package json

[changeset-bot]

🦋 Changeset detected

Latest commit: e53f57f

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

This PR includes changesets to release 6 packages

Name	Type
@ultraviolet/themes	Patch
@ultraviolet/form	Patch
@ultraviolet/icons	Patch
@ultraviolet/illustrations	Patch
@ultraviolet/plus	Patch
@ultraviolet/ui	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.98%. Comparing base (b55a6e6) to head (e53f57f).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4280   +/-   ##
=======================================
  Coverage   86.98%   86.98%           
=======================================
  Files         315      315           
  Lines       11435    11435           
  Branches     3143     3103   -40     
=======================================
  Hits         9947     9947           
  Misses       1488     1488           

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