[Feature Request]: Combine the existing dialect capability analysis Skill to create a new dialect addition Agent

### Topic

Any Others

### Description

结合已有方言能力分析 Skill，创建新增方言 Agent

No files, tests, or entry points are named. Start by locating the existing dialect capability analysis Skill, then determine how dialect additions are represented and where a new Agent would be registered; done means the new dialect addition Agent is defined and its expected behavior is verified.

由索引模型根据 Issue 内容生成。