lix/.github/PULL_REQUEST_TEMPLATE.md

Motivation for the changes

Checklist for maintainers

• is the idea good? has it been discussed by the Nix team?
• unit tests
• functional tests (tests/**.sh)
• documentation in the manual
• documentation in the code (if necessary; ideally code is already clear)
• documentation in the commit message (why was this change made? for future reference when maintaining the code)
• documentation in the changelog (to announce features and fixes to existing users who might have to do something to finally solve their problem, and to summarize the development history)