Add pull_request_template.md

Author: crivetimihai

.github/pull_request_template.md

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+# 📝 Pull Request Template Selection
+
+Thank you for contributing! To help us review your pull request effectively, please select the appropriate template:
+
+- **Bug Fix**: [Use the Bug Fix Template](?template=bug_fix.md)
+- **Feature / Enhancement**: [Use the Feature Template](?template=feature.md)
+- **Documentation Update**: [Use the Docs Template](?template=docs.md)
+
+Alternatively, after opening your pull request, you can choose the appropriate template from the **"Choose a template"** dropdown menu located at the top-right of the description box.
+
+If none of the above templates fit your changes, feel free to provide a clear and concise description of your pull request below.