docs(wiki): add Official Docs & SDKs reference page One-stop reference for every external dependency: Flutter, Dart, Riverpod, Hive, Dio, flutter_map, flutter_blue_plus, Supabase, OpenChargeMap, OSRM, Nominatim, the 11 country APIs, Android/iOS platform docs, GDPR + privacy guidance. Linked from _Sidebar, Home, and Dev-Home under a new Reference section. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>