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/transmission.json

@@ -0,0 +1,55 @@
+{
+  "name": "Transmission",
+  "slug": "transmission",
+  "categories": [
+    11
+  ],
+  "date_created": "2025-05-02",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 9091,
+  "documentation": "https://github.com/transmission/transmission/blob/main/docs/README.md",
+  "website": "https://transmissionbt.com/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/transmission.webp",
+  "config_path": "Debian `/etc/transmission-daemon/settings.json` | Alpine `/var/lib/transmission/config/settings.json`",
+  "description": "Transmission is a free, open-source BitTorrent client known for its fast download speeds and ease of use. It supports various platforms such as Windows, Linux, and macOS and has features like web interface, peer exchange, and encrypted transfers.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/transmission.sh",
+      "resources": {
+        "cpu": 2,
+        "ram": 2048,
+        "hdd": 8,
+        "os": "debian",
+        "version": "13"
+      }
+    },
+    {
+      "type": "alpine",
+      "script": "ct/alpine-transmission.sh",
+      "resources": {
+        "cpu": 1,
+        "ram": 256,
+        "hdd": 1,
+        "os": "alpine",
+        "version": "3.23"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "type": "info",
+      "text": "Script disables whitelisting by default. Change config to suit your needs."
+    },
+    {
+      "type": "info",
+      "text": "Alpine script sets initial disk size to 1GB. Please adjust for your needs after installation ends."
+    }
+  ]
+}