Create PULL_REQUEST_TEMPLATE.md

Author: HichemTab-tech

.github/PULL_REQUEST_TEMPLATE.md

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+# Pull Request
+
+Thank you for contributing to JetTreeMark-vscode! 🚀
+
+Please fill out the following checklist to help us review your PR quickly and smoothly.
+
+---
+
+## Description
+
+<!-- Provide a short description of the changes introduced by this PR. -->
+
+---
+
+## Related Issues
+
+<!-- Link any related issues, e.g., "Fixes #12" or "Related to #45". -->
+
+---
+
+## Checklist
+
+- [ ] My code follows the [JetTreeMark-vscode Contribution Guidelines](./CONTRIBUTING.md).
+- [ ] I have tested the changes locally.
+- [ ] I have added or updated necessary documentation (if applicable).
+- [ ] I have updated the changelog (if applicable).
+- [ ] I have ensured that my changes do not break existing features.
+
+---
+
+## Additional Notes
+
+<!-- Anything else the reviewers should know? Screenshots, references, etc. -->