This PR implements task decomposition as requested in Issue #2717.
It allows complex tasks to be automatically split into sub-tasks
without manual intervention.
- Added parent_task and sub_tasks fields to Task class
- Implemented decompose() method to create sub-tasks
- Added combine_sub_task_results() method to aggregate results
- Updated execute_sync() to handle sub-task execution
- Added execute_sub_tasks_async() for asynchronous execution
- Created tests for the task decomposition functionality
- Added example script demonstrating usage
Co-Authored-By: Joe Moura <joao@crewai.com>
