chore(marketplace): add publish-plugin, rewrite init.sh, cleanup obsolete plugins

- Add publish-plugin: marketplace publish + Feishu bot notification
- Rewrite init.sh: SSE-first, fixed prod API, remove env selection
- Update CLAUDE.md, README.md, claude-config.yaml
- Update skills: req-plugin, req-prd-plugin, pull-request-plugin
- Delete sync-skills.sh (obsolete)
- Delete deprecated plugins: skills-ops/*, skills-projects/*, old skills-dev/req duplicates
- Regenerate marketplace.json (27 plugins)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

claude-config.yaml

@@ -1,8 +1,7 @@
 version: "1.0"
 
 mcp:
-  mode: stdio          # stdio | sse
-  env: prod            # dev | staging | prod
+  mode: sse            # sse | stdio
   # Token 不存储在此文件，由 init.sh 引导配置
 
 skills: