feat: add pull request template

PULL_REQUEST_TEMPLATE.md

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+## 📌 Pull Request Template
+
+### 1️⃣ Short Description
+<!-- Provide a concise summary of the changes in this PR. -->
+
+---
+
+### 2️⃣ Related Open Issue
+<!-- Link the related issue(s) this PR is addressing, e.g., Fixes #123 or Closes #456. -->
+Fixes #
+
+---
+
+### 3️⃣ PR Type
+<!-- Select one of the following by marking `[x]` -->
+
+- [ ] 🐞 Bug Fix
+- [ ] ✨ New Feature
+- [ ] 🔄 Refactoring
+- [ ] 📖 Documentation Update
+
+---
+
+### 4️⃣ Does this PR Introduce a Breaking Change?
+<!-- Mark the applicable option -->
+- [ ] ❌ No
+- [ ] ⚠️ Yes (Explain below)
+
+If **yes**, describe the impact and necessary migration steps:
+<!-- Provide a short explanation of what needs to be changed. -->
+
+---
+
+### 5️⃣ Current Behavior (Before Changes)
+<!-- Describe the existing behavior before applying the changes in this PR. -->
+
+---
+
+### 6️⃣ New Behavior (After Changes)
+<!-- Explain how the behavior changes with this PR. -->
+
+---
+
+### ✅ Checklist
+- [ ] Code follows the project's coding guidelines.
+- [ ] Tests have been added or updated (if applicable).
+- [ ] Documentation has been updated (if applicable).
+- [ ] Ready for review and approval.