Created by: KOlofinmoyin
Currently, the label of the "New resource" button is not being translated.
The natural way to translate this is probably to rely on display_resource_name. However this always displays the plural form of the name. In this PR we modify this method to accept an option to display the singular form where requested. Additionally, we introduce the gem kaminary-i18n in the example app. If missing, Kaminari will be missing translations e.g. 'Next' and 'Last' buttons, and will break if we run the app in a different language. Visual testing of this PR requires this gem, so we consider it should be part of the change.