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/umlautadaptarr.json

@@ -0,0 +1,35 @@
+{
+  "name": "UmlautAdaptarr",
+  "slug": "umlautadaptarr",
+  "categories": [
+    14
+  ],
+  "date_created": "2025-04-28",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 5005,
+  "documentation": "https://github.com/PCJones/UmlautAdaptarr/blob/master/README.md",
+  "website": "https://github.com/PCJones/UmlautAdaptarr",
+  "logo": "https://raw.githubusercontent.com/community-scripts/ProxmoxVE/refs/heads/main/misc/images/logo.png",
+  "config_path": "/opt/UmlautAdaptarr/appsettings.json",
+  "description": "UmlautAdaptarr is a tool that fixes issues with how Sonarr, Radarr, Lidarr, and Readarr handle foreign languages. It sits between these apps and the indexers, changing searches and results, and renaming releases so the apps recognize them correctly.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/umlautadaptarr.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 512,
+        "hdd": 2,
+        "os": "debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": []
+}