- Updated the chat command to support new output formats: text, markdown, json, and compact.
- Modified the agent configuration to include output format settings.
- Enhanced the command line interface to handle new format options and provide detailed usage instructions.
- Improved the message printing logic in SimpleChatSession to format output based on the selected format.
- Added JSON and Markdown formatting for session metrics and messages.
- Updated help documentation to reflect changes in command usage and available options.
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