feat(wxapi): 新增小程序联盟商品查询接口

test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/UnionPromoter/OpenProduct/UnionPromoterOpenProductListResponse.json

@@ -0,0 +1,40 @@
+{
+    "errcode": 0,
+    "errmsg": "ok",
+    "total": 59,
+    "productList": [
+        {
+            "shopInfo": {
+                "name": "医保非税小测试",
+                "appId": "wx539e0b4872f196d1",
+                "username": "gh_6e10896a3e3c",
+                "headImgUrl": "http://wx.qlogo.cn/mmhead/Q3auHgzwzM6PxkhYKuFL3Xy6ibu3lJAhosuicqM92GLDdBRHySZuVibiag"
+            },
+            "product": {
+                "productId": "411668902",
+                "info": {
+                    "title": "金幼小儿米茶膏11.8g*抑菌霜（限时送好产品）(1625192914000)",
+                    "headImg": [
+                        "https://snsdy.tc.qq.com/161/20304/snscosdownload/SZ/reserved/5fc36818000f255f00000000d0785609000000a000004f50?imageView2/3/w/750"
+                    ],
+                    "brandId": "2100000000",
+                    "detail": {},
+                    "minPrice": 1,
+                    "totalStockNum": 100,
+                    "path": "pages/productDetail/productDetail?productId=1625192914000"
+                },
+                "skus": [
+                    {
+                        "skuId": "350377364",
+                        "productSkuInfo": {
+                            "thumbImg": "https://store.mp.video.tencent-cloud.com/161/20304/snscosdownload/SH/reserved/60de79d30007ec2000000000c7e04f09000000a100004f50",
+                            "salePrice": 1,
+                            "marketPrice": 1,
+                            "stockNum": "100"
+                        }
+                    }
+                ]
+            }
+        }
+    ]
+}