feat: add pages router example to client intro page

Author: backlineint

www/content/docs/client.mdx

@@ -46,4 +46,18 @@ const article = await drupal.getResource(
 
 ### Pages Router
 
-TODO
+```ts
+import { NextDrupalPages } from "next-drupal"
+
+// Create a new DrupalClient.
+const drupal = new NextDrupalPages("https://example.com")
+
+// Fetch articles.
+const articles = await drupal.getResourceCollection("node--article")
+
+// Fetch one article by id.
+const article = await drupal.getResource(
+  "node--article",
+  "f4c61473-8297-4bf3-bab7-21c9633a7ca7"
+)
+```