docs: update docs across projects following publishable API key change in store routes (#9098)

* docs: update docs across projects following publishable API key change in store routes

* rename env variable

* move subscribe route out of store

www/apps/resources/generated/sidebar.mjs

@@ -8081,6 +8081,14 @@ export const generatedSidebar = [
         "title": "Tips",
         "children": []
       },
+      {
+        "loaded": true,
+        "isPathHref": true,
+        "type": "link",
+        "path": "/storefront-development/publishable-api-keys",
+        "title": "Publishable API Key",
+        "children": []
+      },
       {
         "type": "separator"
       },