add "repository" link to pyproject

[deronnax]

Because link to the Github repository doesn't show up in PyPI and it is annoying.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a899f1c) 72.66% compared to head (27650b2) 72.66%.

❗ Current head 27650b2 differs from pull request most recent head 9ede6b6. Consider uploading reports for the commit 9ede6b6 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #563   +/-   ##
=======================================
  Coverage   72.66%   72.66%           
=======================================
  Files          13       13           
  Lines        1090     1090           
=======================================
  Hits          792      792           
  Misses        298      298           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.