✨ feat(skills): curate code workflow skills

Add a Gitea CI triage skill with legacy web-log fallback, document first-party and third-party skill roles, and register selected third-party code workflow sources.

Remove the first-party bulk refactor workflow in favor of the registered codebase migration replacement.

README.md

@@ -127,7 +127,6 @@ Layer 1: rulesets/          (≤50 行/语言，模板源)
 Layer 2: skills/           (按需加载，$skill-name 触发)
   ├─ commit-message: 提交信息规范
   ├─ style-cleanup: 代码风格整理
-  ├─ bulk-refactor-workflow: 批量重构流程
   └─ thirdparty/: 第三方同步 skills
 
 Layer 3: docs/             (权威静态文档)
@@ -173,8 +172,8 @@ TSL 相关问题直接查阅 `rulesets/tsl/index.md` 与 `docs/tsl/`。
 **通用 Skills**：
 
 - `$commit-message`：提交信息规范
+- `$gitea-fix-ci`：诊断 Gitea Actions / PR checks 失败并按批准计划修复
 - `$style-cleanup`：整理代码风格
-- `$bulk-refactor-workflow`：批量重构流程
 - 更多见 `SKILLS.md`
 
 **安装与使用**：详见 `SKILLS.md`