Load spree backend / frontend assets

The dummy app only includes the extension manifest file so we need to
load the spree core assets to run features specs properly

app/assets/javascripts/admin/spree_i18n.js

@@ -1 +1,2 @@
+//= require admin/spree_backend
 //= require_tree .

app/assets/javascripts/store/spree_i18n.js

@@ -1 +1,2 @@
+//= require store/spree_frontend
 //= require_tree .

app/assets/stylesheets/admin/spree_i18n.css

@@ -0,0 +1,8 @@
+/*
+ * This is a manifest file that'll automatically include all the stylesheets available in this directory
+ * and any sub-directories. You're free to add application-wide styles to this file and they'll appear at
+ * the top of the compiled file, but it's generally better to create a new file per style scope.
+ *
+ *= require admin/spree_backend
+ *= require_tree .
+*/

app/assets/stylesheets/store/spree_i18n.css

@@ -0,0 +1,8 @@
+/*
+ * This is a manifest file that'll automatically include all the stylesheets available in this directory
+ * and any sub-directories. You're free to add application-wide styles to this file and they'll appear at
+ * the top of the compiled file, but it's generally better to create a new file per style scope.
+ *
+ *= require store/spree_frontend
+ *= require_tree .
+*/