Support stylelint validate and autofix (#2298)

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## Related Issue

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<!-- Fixes #0000 -->

## Summary

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- eslint에만 validate & autofix 가 적용되어 있어서 stylelint도 추가했습니다.

## Details

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- 생략

### Breaking change? (Yes/No)

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- No 

## References

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.vscode/settings.json

@@ -5,9 +5,11 @@
  }
  ],
  "editor.codeActionsOnSave": {
- "source.fixAll.eslint": "explicit"
+ "source.fixAll.eslint": "explicit",
+ "source.fixAll.stylelint": "explicit"
  },
  "editor.defaultFormatter": "esbenp.prettier-vscode",
  "editor.formatOnSave": true,
- "typescript.tsdk": "node_modules/typescript/lib"
+ "typescript.tsdk": "node_modules/typescript/lib",
+ "stylelint.validate": ["css", "scss", "postcss"]
 }