Add example of mark files to README
Dependencies
Change contents
- edit in README.md at line 21[2.514]
I recommend using mark files to record the correspondencebetween states in Pijul and commits in Git:```mkdir myproject-gitcd myproject-gitgit inittouch pijul-marks git-markspijul-export --repo ~/myproject --marks pijul-marks | git fast-import --import-marks=git-marks --export-marks=git-marksgit checkout main```