docs: revise storefront development guide (#10522)

www/apps/resources/generated/edit-dates.mjs

@@ -193,7 +193,7 @@ export const generatedEditDates = {
   "app/storefront-development/regions/store-retrieve-region/page.mdx": "2024-09-11T10:07:42.887Z",
   "app/storefront-development/regions/page.mdx": "2024-06-09T15:19:09+02:00",
   "app/storefront-development/tips/page.mdx": "2024-10-22T11:01:01.298Z",
-  "app/storefront-development/page.mdx": "2024-06-09T15:19:09+02:00",
+  "app/storefront-development/page.mdx": "2024-12-10T09:23:20.666Z",
   "app/troubleshooting/cors-errors/page.mdx": "2024-05-03T17:36:38+03:00",
   "app/troubleshooting/create-medusa-app-errors/page.mdx": "2024-07-11T10:29:13+03:00",
   "app/troubleshooting/database-errors/page.mdx": "2024-05-03T17:36:38+03:00",

www/apps/resources/generated/sidebar.mjs

@@ -8092,21 +8092,26 @@ export const generatedSidebar = [
       {
         "loaded": true,
         "isPathHref": true,
-        "type": "link",
-        "path": "/storefront-development/tips",
-        "title": "Tips",
-        "children": []
-      },
-      {
-        "loaded": true,
-        "isPathHref": true,
-        "type": "link",
-        "path": "/storefront-development/publishable-api-keys",
-        "title": "Publishable API Key",
-        "children": []
-      },
-      {
-        "type": "separator"
+        "type": "category",
+        "title": "General",
+        "children": [
+          {
+            "loaded": true,
+            "isPathHref": true,
+            "type": "link",
+            "path": "/storefront-development/tips",
+            "title": "Tips",
+            "children": []
+          },
+          {
+            "loaded": true,
+            "isPathHref": true,
+            "type": "link",
+            "path": "/storefront-development/publishable-api-keys",
+            "title": "Publishable API Key",
+            "children": []
+          }
+        ]
       },
       {
         "loaded": true,