refactor: remove frontend, move JSONs to json/ top-level

- Archive frontend to community-scripts/ProxmoxVE-Frontend-Archive
- Move frontend/public/json/ -> json/
- Update workflow paths in 5 actions:
  - update-versions-github.yml
  - update-json-date.yml
  - push-json-to-pocketbase.yml
  - delete-pocketbase-entry-on-removal.yml
  - autolabeler.yml
- Remove frontend-cicd.yml (no longer needed)
- Clean up .gitignore (remove frontend-specific entries)

json/kutt.json

@@ -0,0 +1,40 @@
+{
+  "name": "Kutt",
+  "slug": "kutt",
+  "categories": [
+    21
+  ],
+  "date_created": "2026-01-14",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 443,
+  "documentation": "https://github.com/thedevs-network/kutt/",
+  "config_path": "/opt/kutt/.env",
+  "website": "https://kutt.it",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/kutt.webp",
+  "description": "Kutt is a modern URL shortener with support for custom domains. Create and edit links, view statistics, manage users, and more.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/kutt.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 1024,
+        "hdd": 2,
+        "os": "Debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Kutt needs so be served with an SSL certificate for its login to work. During install, you will be prompted to choose if you want to have Caddy installed for SSL termination or if you want to use your own reverse proxy (in that case point your reverse proxy to port 3000).",
+      "type": "info"
+    }
+  ]
+}