utils/theme library

1. flutter_ai_chat package
2. documentation
3. utils/theme.dart

flutter_ai_chat package

1. Libraries
2. flutter_ai_chat
3. main
4. models/chat_message
5. models/conversation
6. providers/chat_provider
7. screens/chat_screen
8. services/ai_service
9. utils/theme
10. widgets/chat_input_widget
11. widgets/chat_message_widget
12. widgets/sidebar_widget