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/paymenter.json

@@ -0,0 +1,40 @@
+{
+  "name": "Paymenter",
+  "slug": "paymenter",
+  "categories": [
+    21
+  ],
+  "date_created": "2025-01-28",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 80,
+  "documentation": "https://paymenter.org/docs",
+  "website": "https://paymenter.org/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/paymenter.webp",
+  "config_path": "/opt/paymenter/.env",
+  "description": "Paymenter is an open source webshop solution for hosting companies. It's developed to provide an more easy way to manage your hosting company.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/paymenter.sh",
+      "resources": {
+        "cpu": 2,
+        "ram": 1024,
+        "hdd": 5,
+        "os": "debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": "admin@paymenter.org",
+    "password": "paymenter"
+  },
+  "notes": [
+    {
+      "text": "After installation, navigate to the directory with `cd /opt/paymenter` and run `php artisan app:init`. An interactive setup will prompt you to enter your company name and application URL.",
+      "type": "info"
+    }
+  ]
+}