Added additional exports for IDE and documentation visibility

lib/mastodon_api.dart

@@ -50,6 +50,7 @@ export 'package:mastodon_api/src/service/entities/preview_card.dart';
 export 'package:mastodon_api/src/service/entities/preview_card_type.dart';
 export 'package:mastodon_api/src/service/entities/rate_limit.dart';
 export 'package:mastodon_api/src/service/entities/registered_application.dart';
+export 'package:mastodon_api/src/service/entities/rule.dart';
 export 'package:mastodon_api/src/service/entities/status.dart';
 export 'package:mastodon_api/src/service/entities/suggested_reason.dart';
 export 'package:mastodon_api/src/service/entities/suggestion.dart';
@@ -66,12 +67,14 @@ export 'package:mastodon_api/src/service/v1/accounts/account_profile_meta_param.
 export 'package:mastodon_api/src/service/v1/accounts/accounts_v1_service.dart';
 export 'package:mastodon_api/src/service/v1/accounts/post_privacy.dart';
 export 'package:mastodon_api/src/service/v1/apps/apps_v1_service.dart';
+export 'package:mastodon_api/src/service/v1/instance/instance_v1_service.dart';
 export 'package:mastodon_api/src/service/v1/statuses/status_poll_param.dart';
 export 'package:mastodon_api/src/service/v1/statuses/statuses_v1_service.dart';
 export 'package:mastodon_api/src/service/v1/timelines/timelines_v1_service.dart';
 export 'package:mastodon_api/src/service/v2/accounts/accounts_v2_service.dart';
 export 'package:mastodon_api/src/service/v2/entities/v2_instance.dart';
 export 'package:mastodon_api/src/service/v2/entities/v2_instance_configuration.dart';
 export 'package:mastodon_api/src/service/v2/entities/v2_search.dart';
+export 'package:mastodon_api/src/service/v2/instance/instance_v2_service.dart';
 export 'package:mastodon_api/src/service/v2/search/search_content_type.dart';
 export 'package:mastodon_api/src/service/v2/search/search_v2_service.dart';