Add shop console home docs and screenshots (#559)

Introduce a new documentation page for the shop console home (docs/user-guide/shop/console-home.mdx) with three preview screenshots added to static/img/user-guide/shop/. Update sidebars.js to include the new page so it appears in the user guide navigation. This documents the console's overview, metrics and guidance for store operators.

docs/user-guide/shop/console-home.mdx

@@ -0,0 +1,12 @@
+---
+title: 控制台首页
+description: 商城控制台首页相关使用文档。
+---
+
+控制台的商店首页主要用于查看运营数据、指引、商店数据等信息。
+
+![](/img/user-guide/shop/preview-console-home-1.png)
+
+![](/img/user-guide/shop/preview-console-home-2.png)
+
+![](/img/user-guide/shop/preview-console-home-3.png)

sidebars.js

@@ -114,6 +114,7 @@ module.exports = {
           },
           items: [
             "user-guide/shop/prepare",
+            "user-guide/shop/console-home",
             "user-guide/shop/payments",
             "user-guide/shop/sales-channels",
             "user-guide/shop/products",