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/scaling-governor.json

@@ -0,0 +1,40 @@
+{
+  "name": "PVE CPU Scaling Governor",
+  "slug": "scaling-governor",
+  "categories": [
+    1
+  ],
+  "date_created": "2024-04-29",
+  "type": "pve",
+  "updateable": false,
+  "privileged": false,
+  "interface_port": null,
+  "documentation": "https://www.kernel.org/doc/html/latest/admin-guide/pm/cpufreq.html?#generic-scaling-governors",
+  "website": null,
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/proxmox.webp",
+  "config_path": "",
+  "description": "The CPU scaling governor determines how the CPU frequency is adjusted based on the workload, with the goal of either conserving power or improving performance. By scaling the frequency up or down, the operating system can optimize the CPU usage and conserve energy when possible. Generic Scaling Governors",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "tools/pve/scaling-governor.sh",
+      "resources": {
+        "cpu": null,
+        "ram": null,
+        "hdd": null,
+        "os": null,
+        "version": null
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Execute within the Proxmox shell",
+      "type": "info"
+    }
+  ]
+}