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>

skills-dev/agent-swarm-plugin/.claude-plugin/plugin.json

@@ -1,8 +0,0 @@
-{
-  "name": "agent-swarm-plugin",
-  "description": "Multi-agent orchestration using OpenAI Swarm patterns. Coordinate specialized agents for complex development workflows with handoffs and context sharing.",
-  "version": "1.0.0",
-  "author": {
-    "name": "qiudl"
-  }
-}