Create pull_request_template.md (#902)

.github/pull_request_template.md

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+## Pull Request
+
+**Summary:**
+<!-- Provide a brief summary of the changes in this pull request -->
+
+**Related Issue:**
+<!-- If applicable, reference the GitHub issue that this pull request resolves -->
+
+**Description:**
+<!-- Elaborate on the changes made in this pull request. What motivated these changes? -->
+
+**Testing:**
+<!-- Describe the steps you've taken to test the changes. Include relevant information for other contributors to verify the modifications -->
+
+**Screenshots (if applicable):**
+<!-- Include any relevant screenshots or GIFs that demonstrate the changes -->
+
+**Checklist:**
+<!-- Make sure all of these items are completed before submitting the pull request -->
+
+- [ ] Code follows the project's coding standards
+- [ ] Tests have been added or updated to cover the changes
+- [ ] Documentation has been updated (if applicable)
+- [ ] All existing tests pass
+- [ ] Conforms to the contributing guidelines
+
+**Additional Notes:**
+<!-- Any additional information or notes for the reviewers -->