submit a new scheduler

[Ethereal-O]

Purpose of the PR

• Design a new scheduler

Main Changes

• Support priority/elder/depends based scheduling.

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows.

I have write some scripts in /test folder.

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

Summary by CodeRabbit

• 新功能
  • 引入可插拔调度框架（多种调度算法、过滤器、软调度、并发）、资源与任务队列管理、Cron 定时任务支持；批量任务创建与任务启动序列查询接口及客户端方法；公开查询组内 Worker 接口；在无鉴权模式下启用 admin 路由。
• 文档
  • 新增“基于 Docker 运行”指南与 docker-compose 示例。
• 配置
  • 增加 ticker_interval 默认配置并新增示例 worker.ini。
• 测试
  • 新增调度相关集成测试与测试辅助工具。
• 其他
  • 更新 .gitignore 忽略 test/case/ 目录。