test(documentation): added basic e2e tests for the new palette implementation

[oliverschuerch]

📄 Description

This PR implements some basic e2e test for the new palettes integration. However, they are not complete, but are meant to stabilize the current implementation so that we can figure out if anything goes horribly wrong during further development.

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📝 Checklist

• ✅ My code follows the style guidelines of this project
• 🛠️ I have performed a self-review of my own code
• 📄 I have made corresponding changes to the documentation
• ⚠️ My changes generate no new warnings or errors
• 🧪 I have added tests that prove my fix is effective or that my feature works
• ✔️ New and existing unit tests pass locally with my changes