Enhance documentation and admin UI: Add detailed implementation guidelines in CLAUDE.md, introduce a referrer index in README.md, and update admin UI translations for improved user experience. Update package dependencies for better functionality and performance.

content/de/demo/demo-welcome.json5

@@ -1,6 +1,31 @@
 {
-  _slug: "demo-welcome",
-  title: "Welcome",
-  body: "This is the demo content. Replace types and content with your own; only this demo type and entry stay in version control.",
-  image: "/api/assets/mountains-w300.webp",
+  "_status": "published",
+  "body": "This is the demo content. Replace types and content with your own; only this demo type and entry stay in version control.",
+  "bodyHtml": "",
+  "bodyMarkdown": "",
+  "bodyRichtext": "",
+  "bodyTextOrRef": "",
+  "count": null,
+  "css": "",
+  "image": "/api/assets/mountains-w300.webp",
+  "isActive": false,
+  "labels": [],
+  "mainImage": "",
+  "meta": {
+    "key": "",
+    "value": ""
+  },
+  "multiSelect": [
+    "option1",
+    "option2"
+  ],
+  "publishedAt": "",
+  "quantity": null,
+  "relatedPage": "",
+  "relatedPages": [],
+  "scores": [],
+  "singleSelect": "",
+  "summary": "",
+  "tags": [],
+  "title": "Welcome"
 }