docs: add .github/pull_request_template.md

.github/pull_request_template.md

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+<!-- This is just examples. You can remove all items if you want. -->
+<!-- Please remove all comments. -->
+
+## Title
+
+<!-- e.g. "Implement user authentication feature" -->
+
+## Relevant issues
+
+<!-- e.g. "Fixes #000" -->
+
+## Type
+
+<!-- Select the type of Pull Request -->
+<!-- Keep only the necessary ones -->
+
+🆕 New Feature
+🐛 Bug Fix
+🧹 Refactoring
+📖 Documentation
+💻 Development Environment
+🚄 Infrastructure
+✅ Test
+
+## Changes
+
+<!-- List of changes -->
+
+## Testing
+
+<!-- Test procedure -->
+
+## Notes
+
+<!-- Test results -->
+
+<!-- Points to note for the reviewer, consultation content, concerns -->
+
+## Pre-Submission Checklist (optional but appreciated):
+
+- [ ] I have included relevant documentation updates (stored in /docs/my-website)
+
+## OS Tests (optional but appreciated):
+
+- [ ] Tested on Windows
+- [ ] Tested on MacOS
+- [ ] Tested on Linux