[GithubIssues] Add examples for count github pull requests closed by label (#5639)

* Implement LOC badge

* Apply suggestions from code review

Co-authored-by: Caleb Cartwright <calebcartwright@users.noreply.github.com>

* Fix tokei tests after API change

* Format the code

* Rename tokei service file

* Add comment about Tokei API behavior

* Document tokei badge behavior

* Make keywords consistent and add examples

* Fix typo

* Add examples for labeled closed issues

Co-authored-by: Caleb Cartwright <calebcartwright@users.noreply.github.com>
Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>