add PR template (#250)

This PR addresses the issue
#212

---------

Co-authored-by: PaulZhutovsky <paul.zhutovsky@gmail.com>

.github/PULL_REQUEST_TEMPLATE/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,42 @@
+---
+name: Pull Request
+about: Propose changes to the codebase
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Description
+Please provide a summary of the changes you are proposing with this Pull Request. Include the motivation and context. Highlight any key changes. If this PR fixes an open issue, mention the #issue_number" in this PR.
+
+## Type of change
+Please delete options that are not relevant.
+
+- [ ] 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 not work as expected)
+- [ ] Documentation update
+
+## 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!
+
+- [ ] My code follows the code style of this project.
+- [ ] My change requires a change to the documentation/notebooks.
+- [ ] I have updated the documentation or added a notebook accordingly.
+- [ ] I have tested the code locally according to the **CONTRIBUTING.md** document.
+- [ ] I have added tests to cover my changes.
+- [ ] All new and existing tests passed.
+
+## How Has This Been Tested?
+Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. List any relevant details for your test configuration.
+
+## Screenshots (if applicable):
+Include screenshots or gifs of the changes you have made. This is especially useful for UI changes.
+
+## Additional Context:
+Add any other context or screenshots about the pull request here. This could include reasons for changes, decisions made, or anything you want the reviewer to know.
+
+---
+
+**For more information on contributing, please see the [CONTRIBUTING.md](../../CONTRIBUTING.md) document.**