* created: checks for unused i18n keys in codebase.
* updated the file to test this new check on this PR.
* updated the file to test this new check on this PR.
* updated the file to test this new check on this PR.
* updated the file to test this new check on this PR.
* updated the file to test this new check on this PR.
* removed the testing option. will now only run in `client/src/**`