feat(seo): generate slugs for brands, categories and products, add GET /sitemap and the Postman collection

postman/collections/DinggaDingga/.resources/getSitemap.resources/examples/Public pages.example.yaml

@@ -0,0 +1,21 @@
+$kind: http-example
+request:
+  url: "{{baseUrl}}/sitemap"
+  method: GET
+  headers:
+    Accept: application/json
+response:
+  statusCode: 200
+  statusText: OK
+  headers:
+    Content-Type: application/json; charset=utf-8
+    Cache-Control: public, max-age=600
+  body:
+    type: json
+    content: |
+      {
+        "brands": [{ "slug": "stray-kids", "updatedAt": "2026-11-08T10:00:00.000Z" }],
+        "categories": [{ "slug": "albums", "updatedAt": "2026-11-08T10:00:00.000Z" }],
+        "products": [{ "slug": "ate-digipack", "updatedAt": "2026-11-08T10:00:00.000Z" }]
+      }
+order: 1000