Move json to API and strip index action

app/controllers/api/orders_controller.rb

@@ -0,0 +1,23 @@
+module Api
+  class OrdersController < BaseController
+    def index
+      authorize! :admin, Spree::Order
+
+      search_results = SearchOrders.new(params, spree_current_user)
+
+      render json: {
+        orders: serialized_orders(search_results.orders),
+        pagination: search_results.pagination_data
+      }
+    end
+
+    private
+
+    def serialized_orders(orders)
+      ActiveModel::ArraySerializer.new(
+        orders,
+        each_serializer: Api::Admin::OrderSerializer
+      )
+    end
+  end
+end