Replace skills/multi with wukong's consolidated structure (long-tail products folded into dingtalk-misc), keeping GitHub-only skills (dingtalk-dev/event/pat/profile/skill). Prune MCP-only product refs and align all documented commands/flags with the open-source Cobra tree: remove markdown/*, drive task get, drive version flags, doc read --scope, --async modes, retired conference/chat-file-upload mentions.