* feat: add scheduler functionality with cron-style task management
- Implemented a new scheduler subagent to automate recurring tasks using cron expressions.
- Enhanced the subagent factory to include the skill manager and auxiliary chat model for the scheduler.
- Created a YAML configuration for the scheduler with a detailed system prompt and toolset.
- Updated README files to include documentation on scheduled tasks and usage examples.
- Added tests for the scheduler, including command execution, scheduling tools, and middleware integration.
- Introduced new dependencies for timezone handling and ensured compatibility in the project configuration.
* fix(async-notifier): ensure fallback hint is used for unknown notification kinds
* feat: enhance scheduling functionality and improve system message handling
Xi Zhang