…ormation on the caching files in the goal prompt

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fix: add encoding='utf-8' to all file operations to prevent UnicodeEn…

#212)

* feat(messages): add support for injecting cancelled tool results in message creation

Enhanced the `create_message` method in `MessageService` to include an optional parameter `inject_cancelled_tool_results`. When set to `True`, it creates cancelled tool results if the parent message contains pending tool_use blocks. This change improves the handling of tool execution interruptions by providing relevant feedback in the message flow.

* fix(messages): update tool result content type in MessageService

Changed the type of `tool_result_content` in the `create_message` method from `list[ToolResultBlockParam]` to `list[ContentBlockParam]` to ensure mypy compatability.

* feat: introduce io publisher for communicating events via stdio

* chore: add .env.tmp to .gitignore

* feat: feature flag io_publisher