add pull request template

PULL_REQUEST_TEMPLATE.md

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+# Pull Request Template
+
+## Description
+
+Please provide a brief description of the changes in this pull request.
+
+## Type of Contribution
+
+Please check the type of contribution this PR represents:
+
+- [ ] Adding a New Roadmap
+- [ ] Adding Content for Topics and Subtopics
+- [ ] Bug fix
+- [ ] Enhancement
+- [ ] Documentation update
+
+## Checklist for Adding a New Roadmap
+
+If you're adding a new roadmap, please confirm you've completed the following steps:
+
+- [ ] Created a new directory at `src/data/roadmaps/{roadmapId}`
+- [ ] Added `{roadmapId}.json` file with the correct structure
+- [ ] Added `{roadmapId}.md` file with the required frontmatter
+- [ ] Created a content directory at `src/data/roadmaps/{roadmapId}/content`
+- [ ] Added content files for topics and subtopics as `{topic_id}.md` or `{subtopic_id}.md`
+
+## Checklist for Adding Content
+
+If you're adding content for topics or subtopics, please confirm:
+
+- [ ] Content follows the prescribed layout
+- [ ] Resources are properly tagged with `@type@` (e.g., `@official@`, `@article@`, `@course@`, `@video@`)
+
+## General Checklist
+
+- [ ] I have read the [CONTRIBUTING.md](CONTRIBUTING.md) file
+- [ ] My code follows the [JavaScript Standard Style](https://standardjs.com/)
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+
+## Additional Information
+
+- Is this a breaking change? (yes/no)
+- Does this change require an update to the documentation? (yes/no)
+- Have you updated the documentation? (yes/no)
+
+## Description of Changes
+
+Please provide a more detailed description of your changes here. Include the reasoning behind the changes and any other context that might be helpful for reviewers.
+
+## Related Issues
+
+Please link to any related issues here. If this PR fixes an open issue, use "Fixes #[issue number]" syntax.
+
+## Screenshots (if appropriate)
+
+If your changes include visual elements, please add screenshots here.
+
+## Questions or Concerns
+
+If you have any questions or concerns about your contribution, please list them here.
+
+Remember, you can always reach out to the project maintainers at [[email protected]](mailto:[email protected]) if you need further assistance.