add sku data json

template/sku_data.json

+{
+  "goods_sn": "",
+  "goods_name": "",
+  "brand_name": "",
+  "stock": "",
+  "moq": "",
+  "ladder_price": "",
+  "price_is_us": "",
+  "supplier_name": "",
+  "multiple": "",
+  "batch_sn": "",
+  "eccn": "",
+  "supplier_id": "",
+  "mpq": "",
+  "goods_details": "",
+  "goods_images": ""
+}
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