[groq] [QA][POLICY] Branch Protection + Mandatory Review Policy for All Repos (#918) (#931)

.github/pull_request_template.md

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+---
+
+**⚠️ Before submitting your pull request:**
+
+1. [x] I've read [BRANCH_PROTECTION.md](BRANCH_PROTECTION.md)
+2. [x] I've followed [CONTRIBUTING.md](CONTRIBUTING.md) guidelines
+3. [x] My changes have appropriate test coverage
+4. [x] I've updated documentation where needed
+5. [x] I've verified CI passes (where applicable)
+
+**Context:**
+<Describe your changes and why they're needed>
+
+**Testing:**
+<Explain how this was tested>
+
+**Questions for reviewers:**
+<Ask specific questions if needed>