## 📚 Documentation Update

<!-- Describe the purpose of this PR in one or two sentences. Example: "This PR updates the contributor guidelines by merging frontend and backend sections." -->

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## 📝 What’s Changed?

<!-- Briefly outline what parts of the documentation were added, changed, removed, or reorganized -->

- Combined frontend and backend development guidelines into a single file
- Updated `mkdocs.yml` to reflect new structure
- Added clarification on contribution process
- Fixed outdated links in sidebar

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## 🔍 Related Issue(s)

<!-- Link to related issues, discussions, or context (e.g., closes #123) -->

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## ✅ Checklist

- [ ] I followed the formatting/style of existing documentation
- [ ] I have read the [Contribution Guidelines](../../CONTRIBUTING)
- [ ] I updated `mkdocs.yml` if necessary
- [ ] I verified links and references still work
- [ ] I checked that my changes improve clarity, structure, or accuracy
- [ ] I'm open to feedback and suggestions

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## 🙋 Additional Notes

<!-- Optional: Include anything you want reviewers to be aware of -->