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/myip.json

@@ -0,0 +1,35 @@
+{
+  "name": "MyIP",
+  "slug": "myip",
+  "categories": [
+    4
+  ],
+  "date_created": "2025-09-29",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "config_path": "/opt/myip/.env",
+  "interface_port": 18966,
+  "documentation": "https://github.com/jason5ng32/MyIP#-environment-variable",
+  "website": "https://ipcheck.ing/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/myip.webp",
+  "description": "The best IP Toolbox. Easy to check what's your IPs, IP geolocation, check for DNS leaks, examine WebRTC connections, speed test, ping test, MTR test, check website availability, whois search and more!",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/myip.sh",
+      "resources": {
+        "cpu": 2,
+        "ram": 1024,
+        "hdd": 2,
+        "os": "Debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": []
+}