Create pull request template for contributions

Added a pull request template to guide contributors in providing necessary information about their changes.

Author: anshumanjadiya1102

.github/pull_request_template.md

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+## Description
+
+Please include a summary of the changes and the related issue. Include relevant motivation and context.
+
+Fixes #(issue)
+
+## Type of Change
+
+Please delete options that are not relevant.
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] Code refactoring
+- [ ] Performance improvement
+- [ ] Test addition or update
+
+## How Has This Been Tested?
+
+Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.
+
+- [ ] Test A
+- [ ] Test B
+
+**Test Configuration**:
+* Language/Framework version:
+* Operating System:
+
+## Checklist
+
+- [ ] My code follows the style guidelines of this project
+- [ ] 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
+- [ ] Any dependent changes have been merged and published
+
+## Screenshots (if applicable)
+
+Add screenshots to help explain your changes.
+
+## Additional Notes
+
+Add any other context about the pull request here.