Add support for Circuit UI's Stylelint plugin

[connor-baer]

Purpose

Circuit UI offers both an ESLint and a Stylelint plugin to ensure the correct usage of its design tokens.

Approach and changes

• Automatically configure Circuit UI's Stylelint plugin when it is installed

Definition of done

• Development completed
• Reviewers assigned
• Unit and integration tests

[changeset-bot]

🦋 Changeset detected

Latest commit: ab4b208

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

This PR includes changesets to release 1 package

Name	Type
@sumup/foundry	Minor

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[codecov]

Codecov Report

Attention: Patch coverage is 99.21260% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 66.56%. Comparing base (08122eb) to head (ab4b208).

Files	Patch %	Lines
src/lib/options.ts	98.83%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #956      +/-   ##
==========================================
+ Coverage   65.61%   66.56%   +0.95%     
==========================================
  Files          29       29              
  Lines        2312     2381      +69     
  Branches      125      134       +9     
==========================================
+ Hits         1517     1585      +68     
- Misses        786      787       +1     
  Partials        9        9              

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