Fix documentation playground react

[AndreasBerliner]

💡 What is the current behavior?

Documentation:

• The React code examples do not include CSS files.
• The React StackBlitz examples do not work as a consequence of the previous issue.
• The document: 'Forms -> Validation -> Development' is missing CSS files.

GitHub Issue Number: N/A

🆕 What is the new behavior?

Documentation:

• The React code examples include the CSS files.
• The React StackBlitz examples do not show an error due to missing CSS files anymore.
• The document: 'Forms -> Validation -> Development' includes the CSS files for Angular, React and Vue.

🏁 Checklist

A pull request can only be merged if all of these conditions are met (where applicable):

• 🦮 Accessibility (a11y) features were implemented
• 🗺️ Internationalization (i18n) - no hard coded strings
• 📲 Responsiveness - components handle viewport changes and content overflow gracefully
• 📄 Documentation was reviewed/updated (pnpm run docs)
• 🧪 Unit tests were added/updated and pass (pnpm test)
• 📸 Visual regression tests were added/updated and pass (Guide)
• 🧐 Static code analysis passes (pnpm lint)
• 🏗️ Successful compilation (pnpm build, changes pushed)

👨‍💻 Help & support

[changeset-bot]

⚠️ No Changeset found

Latest commit: 32c4a7d

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud