feat: pull request template

.github/pull_request_template.md

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+## 🎯 Purpose
+
+*What problem does this PR solve or what feature does it add? Mention issues related to it*
+
+TO COMPLETE
+
+## ⚙️ Approach
+
+*Describe the core changes introduced by this PR.*
+
+TO COMPLETE
+
+- [ ] Change ...
+- [ ] Add ...
+- [ ] Fix ...
+- [ ] ...
+
+## 🧪 How to Test
+
+*How to verify that this PR works as intended.*
+
+TO COMPLETE
+
+## 🔗 Dependencies
+
+*Link PRs that must be merged before this one.*
+
+TO COMPLETE IF APPLICABLE
+
+## 🔜 Future Work
+
+*List any work intentionally left out of this PR, whether due to scope, prioritization, or pending decisions.*
+
+TO COMPLETE IF APPLICABLE
+
+## 📋 PR Completion Checklist
+
+*Mark only completed items. A complete PR should have all boxes ticked.*
+
+- [ ] Complete PR description
+- [ ] Implement the core functionality
+- [ ] Add/update tests
+- [ ] Add/update documentation and inline comments