多任务并行执行管理器。接收多条指令并同步执行，支持优先级调度、任务依赖、结果收集和进度跟踪。适用于需要并发处理多个独立任务的场景。
Initial release of parallel-task-executor: - Introduces a parallel task management system supporting priority scheduling, task dependencies, result aggregation, and progress tracking. - Handles multiple user instructions as independent tasks, with automatic task type recognition and priority assignment. - Supports both parallel and serial execution modes, with configurable concurrency limits, timeouts, and retry policies. - Provides real-time progress tracking and detailed execution reporting. - Implements robust error handling with automatic retries, isolation of failed tasks, and clear failure analysis. - Offers configuration options and best practice guidelines for optimizing parallel task execution.