Create pull request template

Add a template for pull requests to standardize submissions.

Author: Rizwan102003

pull_request_template.md

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+# Pull Request Template
+
+## Description
+- Briefly explain what this PR does and why.
+- Mention any key changes, new features, or fixes.
+
+## Related Issue
+- Please link the issue this PR closes.  
+  Example: `Closes #<issue_number>`
+
+## Add Screenshots
+- Add screenshots, GIFs, or recordings showing the changes.
+- For UI/UX changes, this is **mandatory**.
+
+## Checklist
+- [ ] I have tested my changes locally.
+- [ ] I have updated documentation if needed.
+- [ ] This PR follows the project’s coding guidelines.
+
+## Review
+- Please request a review from **@Rizwan102003** or **@arushi2610** before merging.