chore: apply linter to the various example and test directories (#550)

* chore: remove examples and tests from analysis exclusion

* chore: apply linter fixes to stream_chat_flutter_core/example/main.dart

* chore: apply linter fixes to stream_chat_flutter/example/main.dart

* chore: apply linter fixes to stream_chat_persistence/example/main.dart

* chore: apply linter fixes to stream_chat/example/main.dart

* chore: apply linter fixes to stream_chat_flutter/example/split_view.dart

* chore: renamte tutorial files per linter

* chore: apply linter fixes to tutorial_part_1.dart

* chore: apply linter fixes to tutorial_part_2.dart

* chore: apply linter fixes to tutorial_part_3.dart

* chore: apply linter fixes to tutorial_part_4.dart

* chore: apply linter fixes to tutorial_part_5.dart

* chore: make a widget const in tutorial_part_5.dart

* chore: apply linter fixes to tutorial_part_6.dart

* chore: sort and update dependencies in stream_chat_persistence/example/pubspec.yaml

* chore: sort and update dependencies in stream_chat_flutter_core/example/pubspec.yaml

* chore: sort and update dependencies in stream_chat_flutter/example/pubspec.yaml

* chore: sort dependencies in stream_chat_flutter/example/pubspec.yaml

* chore: apply linter fixes to channel_test.dart

* chore: apply linter fixes to client_test.dart

* chore: apply linter fixes to client_test.dart, stream_http_client_test.dart, and token_manager_test.dart

* chore: apply linter fixes to filter_test.dart

* chore: apply linter fixes to reaction_test.dart

* chore: apply linter fixes to chat_persistence_client_test.dart

* chore: apply linter fixes to channel_image_test.dart

* chore: apply linter fixes to deleted_message_test.dart

* chore: apply linter fixes to full_screen_media_test.dart

* chore: apply linter fixes to gallery_footer_theme_test.dart

* chore: apply linter fixes to gallery_header_theme_test.dart

* chore: apply linter fixes to message_text_test.dart

* chore: apply linter fixes to reaction_bubble_test.dart

* chore: apply linter fixes to system_message_test.dart

* chore: apply linter fixes to typing_indicator_test.dart

* chore: apply linter fixes to channel_list_core_test.dart

* chore: apply linter fixes to channels_bloc_test.dart

* chore: apply linter fixes to lazy_load_scroll_view_test.dart

* chore: apply linter fixes to channel_matcher.dart

* chore: apply linter fixes to message_matcher.dart

* chore: apply linter fixes to users_matcher.dart

* chore: apply linter fixes to message_list_core_test.dart

* chore: apply linter fixes to message_search_bloc_test.dart

* chore: apply linter fixes to message_search_list_core_test.dart

* chore: apply linter fixes to stream_channel_test.dart

* chore: apply linter fixes to stream_chat_core_test.dart

* chore: apply linter fixes to user_list_core_test.dart

* chore: apply linter fixes to channel_query_dao_test.dart, message_mapper_test.dart, user_mapper_test.dart, and users_bloc_test.dart

* chore: apply some missed dartfmt

* test: regenerate failinggolden test

packages/stream_chat_persistence/example/pubspec.yaml

@@ -8,9 +8,9 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
+  cupertino_icons: ^1.0.3
   flutter:
     sdk: flutter
-  cupertino_icons: ^1.0.0
   stream_chat_persistence:
     path: ../