feat(definitions): declare unifiOs integration kind, category and widget kind

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/translation/src/lang/en.json

@@ -1015,6 +1015,7 @@
       "search": "Search",
       "mediaTranscoding": "Transcoding",
       "networkController": "Network",
+      "unifiOs": "UniFi OS",
       "releasesProvider": "Releases",
       "notifications": "Notifications",
       "firewall": "Firewall",