Remove: Fenrus (#9088)

* Delete ct/fenrus.sh

* Delete ct/headers/fenrus

* Delete install/fenrus-install.sh

* Delete frontend/public/json/fenrus.json

frontend/public/json/fenrus.json

@@ -1,35 +0,0 @@
-{
-  "name": "Fenrus",
-  "slug": "fenrus",
-  "categories": [
-    10
-  ],
-  "date_created": "2024-05-05",
-  "type": "ct",
-  "updateable": false,
-  "privileged": false,
-  "interface_port": 5000,
-  "documentation": "https://github.com/revenz/Fenrus/wiki",
-  "website": "https://github.com/revenz/Fenrus",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons/webp/fenrus.webp",
-  "config_path": "",
-  "description": "A personal home page for quick access to all your personal apps/sites.",
-  "install_methods": [
-    {
-      "type": "default",
-      "script": "ct/fenrus.sh",
-      "resources": {
-        "cpu": 1,
-        "ram": 512,
-        "hdd": 4,
-        "os": "debian",
-        "version": "12"
-      }
-    }
-  ],
-  "default_credentials": {
-    "username": null,
-    "password": null
-  },
-  "notes": []
-}