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>

generate-marketplace.py

@@ -19,11 +19,8 @@ SKILL_DIRS = [
     ("core",        "skills-core"),
     ("dev",         "skills-dev"),
     ("req",         "skills-req"),
-    ("ops",         "skills-ops"),
     ("integration", "skills-integration"),
     ("biz",         "skills-biz"),
-    ("workflow",    "skills-workflow"),
-    ("projects",    "skills-projects"),
     ("personal",    "skills-personal"),
 ]