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/dolibarr.json

@@ -0,0 +1,40 @@
+{
+  "name": "Dolibarr",
+  "slug": "dolibarr",
+  "categories": [
+    25
+  ],
+  "date_created": "2025-02-20",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 80,
+  "documentation": "https://wiki.dolibarr.org/index.php?title=Home",
+  "website": "https://www.dolibarr.org/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/dolibarr.webp",
+  "config_path": "/usr/share/dolibarr/htdocs/conf/conf.php.example",
+  "description": "Dolibarr ERP CRM is a modern software package to manage your company or foundation's activity (contacts, suppliers, invoices, orders, stocks, agenda, accounting, ...). it's an open source Web application (written in PHP) designed for businesses of any sizes, foundations and freelancers.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/dolibarr.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 2048,
+        "hdd": 6,
+        "os": "debian",
+        "version": "12"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Database credentials: `cat ~/dolibarr.creds`",
+      "type": "info"
+    }
+  ]
+}