📝 Add a pull request template

.github/pull_request_template.md

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+# Pull Request Details
+
+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+
+<!--- Describe your changes in detail -->
+
+## Related Issue
+
+<!--- This project only accepts pull requests related to open issues -->
+<!--- If suggesting a new feature or change, please discuss it in an issue first -->
+<!--- If fixing a bug, there should be an issue describing it with steps to reproduce -->
+<!--- Please link to the issue here: -->
+
+## Motivation and Context
+
+<!--- Why is this change required? What problem does it solve? -->
+
+## How Has This Been Tested
+
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+## Types of changes
+
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+
+- [ ] Docs change / refactoring / dependency upgrade
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to change)
+
+## Checklist
+
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+
+- [ ] I have read the [**CONTRIBUTING**](https://github.com/JetBrains/qodana-action/blob/master/CONTRIBUTING.md) document.
+- [ ] My code follows the code style of this project.
+- [ ] My commit messages are styled with [gitmoji](https://gitmoji.dev)
+- [ ] My change requires a change to the [documentation](https://jetbrains.com/help/qodana).
+  - [ ] [Qodana for GitHub](https://www.jetbrains.com/help/qodana/github.html)
+  - [ ] [Qodana for Azure Pipelines](https://www.jetbrains.com/help/qodana/azure-pipelines.html)
+  - [ ] [Qodana for CircleCI](https://www.jetbrains.com/help/qodana/circleci.html)
+- [ ] I have updated the documentation accordingly.
+- [ ] I have added tests to cover my changes.
+- [ ] All new and existing tests passed.