feat(backend): add ascii animation for parallax run/parallax join

[TianyiZhao1437]

📋 PR Title Format

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• type is one of: feat, fix, docs, refactor, perf, test, chore.
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📝 Change Type

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• Feat: New feature.
• Fix: Bug fix.
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• Test: Adding missing tests or correcting existing tests.
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💡 Description

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Key Changes

1. Add ascii animation created from ascii-motion

🔗 Related Issues

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• Closes #IssueNumber (e.g., Closes #123)

✅ Checklist

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• I have performed a self-review of my own code.
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