chore: add PR template

.github/pull_request_template.md

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+# Pull Request Template
+
+## Description
+
+Please include a summary of the changes and the related issue (if any). Describe your changes in detail to help reviewers understand your contribution.
+
+- **What is the purpose of this PR?**
+- **What was changed?**
+- **Why was it changed?**
+- **Does this address any existing issues or enhancement requests?**
+
+Fixes # (issue)
+
+## Type of change
+
+Please select the type of change your PR introduces:
+
+- [ ] Bugfix
+- [ ] Feature
+- [ ] Code Style Update (formatting, renaming)
+- [ ] Refactor (code changes that do not fix a bug or add a feature)
+- [ ] Documentation Update
+- [ ] Other (please describe):
+
+## How Has This Been Tested?
+
+Please describe the tests that you ran to verify your changes. Provide instructions to reproduce these tests. List any relevant details for your test configuration.
+
+- **Test Configuration**:
+    - Kubernetes Version:
+    - Helm Version:
+    - OS:
+
+- **Test Steps**:
+    1. Step 1
+    2. Step 2
+    3. ...
+
+## Checklist:
+
+- [ ] My code follows the style guidelines of this project.
+- [ ] I have performed a self-review of my code.
+- [ ] I have commented on 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 in downstream modules.