- Updated `config.ini.example` to introduce the `respond_to_mentions` setting, allowing configuration of how the bot responds to mentions in channel messages.
- Refactored `MessageHandler` to implement logic for handling mentions based on the new configuration, including stripping mentions when appropriate.
- Added `cleanup_message_for_matching` method in `BaseCommand` to streamline message processing and mention validation.
- Enhanced various command classes to utilize the new cleanup method for consistent mention handling.
- Introduced tests to validate the behavior of the new mention handling logic across different configurations.