Add a tool to remove unused translations

[#73655808]
Fix placeholder translations for service package

Found out that the placeholder translations were wildly incorrect. We
discovered this when we reminded ourselves that the english translations
are never actually translated -- the i18n package we're using makes the
incorrect assumption that your english keys will match the translations

[#73655808]
Change 'push' TIP to 'restage' where appropriate

As in the previous commit, trying to make this more consistent.

[Finishes #73655808]