fix: Matrix Validation UX

[Dhruwang]

What does this PR do?

Fixes https://github.com/formbricks/internal/issues/106
We show a toast onBlur when there are identical rows/columns like we do in multi select questions
Also it makes the card red, if some validation error exist

How should this be tested?

Checklist

Required

• Filled out the "How to test" section in this PR
• Read How we Code at Formbricks
• Self-reviewed my own code
• Commented on my code in hard-to-understand bits
• Ran pnpm build
• Checked for warnings, there are none
• Removed all console.logs
• Merged the latest changes from main onto my branch with git pull origin main
• My changes don't cause any responsiveness issues
• First PR at Formbricks? Please sign the CLA! Without it we wont be able to merge it 🙏

Appreciated

• If a UI change was made: Added a screen recording or screenshots to this PR
• Updated the Formbricks Docs if changes were necessary

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[github-actions]

Thank you for following the naming conventions for pull request titles! 🙏

[jobenjada]

UX looks good, @mattinannt pls do / assign code review

[jobenjada]

UX looks good (see comment on Slack)