plugin-creator: One-click Scaffold Codex Plugin with Official Skill

# Official OpenAI System Skill Plugin-Creator: Guide This article introduces OpenAI's official Skill Plugin-Creator system, detailing how to scaffold plugin directories for Codex/ChatGPT, generate the required `.codex-plugin/plugin.json` file, create placeholders for skills, hooks, MCP, apps as needed, and write configurations to local or repository-level `marketplace.json`. It also covers conversational invocation methods (`$plugin-creator` / `@plugin-creator`), command parameters for `create_basic_plugin.py`, conventions for manifest and marketplace fields, applicable scenarios, and common pitfalls.