feat(vm): add FygoOS to the NAS systems of Create VM

- NAS menu: FygoOS, with the latest installer published on fygonas.com detected and a fallback version
- Menu search finds the NAS menu by the name of each system
- Docs: FygoOS card and per-system notes, including its web port

scripts/menus/search_index.json

@@ -142,7 +142,7 @@
     "title": "Create VM System NAS",
     "menu": "Create VM from template or script",
     "script": "menus/create_vm_menu.sh",
-    "keywords": "vm virtual nas",
+    "keywords": "vm virtual nas truenas openmediavault omv xigmanas rockstor fygoos fygonas fnos",
     "argument": "1"
   },
   {