[actions, reducers] onSale 관련 logic 추가

Detail Notes :

1. action type 추가 (COPY_CATEGORY_INFO)
2. reducer 수정 (copiedCategoryInfos)

com.twin.app.shoptime/src/actions/onSaleActions.js

@@ -42,3 +42,8 @@ export const getOnSaleInfo = (props) => (dispatch, getState) => {
     onFail
   );
 };
+
+export const copyCategoryInfos = (categoryInfos) => ({
+  type: types.COPY_CATEGORY_INFO,
+  payload: categoryInfos,
+});