Merge pull request #1852 from OceanParcels/v/pr-message

Add PR template

Author: VeckoTheGecko

.github/pull_request_template.md

@@ -0,0 +1,6 @@
+<!-- Feel free to remove list items that are not relevant for your changes. -->
+
+- [ ] Chose the correct base branch (`main` for v3 changes, `v4-dev` for v4 changes)
+- [ ] Fixes #
+- [ ] Added tests
+- [ ] Added documentation