Lines from nep

[ClaraBuettner]

Adds lines based on NEP 2021

📋 Pull Request Guidelines

Please read the Pull Request Guidelines carefully before creating your PR.

---

🧑‍💻 Contributor Checklist

Before requesting a review, make sure you've completed all of the following:

• All tests pass locally or via CI
  (for more information on local test, check tox in the Contributing section)
  (CI tests are automatically executed when creating a PR, you can see the results of the checks below)
• Workflow has run at least once in Test mode
  (optional if no dataset changes are involved)
• Relevant documentation is updated (API, new features, etc.)
• Dataset-versions are updated when existing datasets are adjusted.
• Added a note to CHANGELOG.rst about the changes
• Added yourself to AUTHORS.rst

Optional:

• Changes have been tested in Everything mode
• Extend the checklist for reviewers: Which aspects should be reviewed in particular?

<!-- Example:
Please focus on validating the data handling in file XYZ.
-->

---

🔍 Reviewer Checklist

During your review, please check the following:

• Is the code clean, readable, and efficient? Are there any oddities or obvious inefficiencies?
• Does the code work as expected? (should already be verified by contributor)
• Do all tests pass? (see CI results)
• Is the documentation complete and up to date?
• Is CHANGELOG.rst updated accordingly?
• Is all necessary metadata complete and correct?
  • If metadata is pending: Is there an appropriate issue filed?

---

📝 Additional Notes (optional)

---

💡 Tip: If you add multiple reviewers, clarify who should check what — this saves time and avoids duplicated efforts.