Add support for inheritable translations

Waiting for ViewComponent/view_component#1934
to be released.

admin/app/components/solidus_admin/base_component.rb

@@ -10,6 +10,31 @@ def icon_tag(name, **attrs)
       render component("ui/icon").new(name: name, **attrs)
     end
 
+    module InheritableTranslations
+      def build_i18n_backend
+        return if compiled?
+
+        # We need to load the translations files from the ancestors so a component
+        # can inherit translations from its parent and is able to overwrite them.
+        translation_files = ancestors.reverse_each.with_object([]) do |ancestor, files|
+          if ancestor.is_a?(Class) && ancestor < ViewComponent::Base
+            files.concat(ancestor.sidecar_files(%w[yml yaml].freeze))
+          end
+        end
+
+        # In development it will become nil if the translations file is removed
+        self.i18n_backend = if translation_files.any?
+          I18nBackend.new(
+            i18n_scope: i18n_scope,
+            load_paths: translation_files
+          )
+        end
+      end
+    end
+
+    # Can be removed once https://github.com/ViewComponent/view_component/pull/1934 is released
+    extend InheritableTranslations unless Gem::Version.new(ViewComponent::VERSION) >= Gem::Version.new("3.9")
+
     def missing_translation(key, options)
       keys = I18n.normalize_keys(options[:locale] || I18n.locale, key, options[:scope])