v0.1.0 - OpenAI-compatible agent skills pack

Initial release of the original agent skills OpenAI-compatible pack. Includes Codex skill, Claude workflow notes, Cursor rules, Gemini instructions, endpoint diagnostic prompt, provider migration prompt, link checker, secret scanner, setup docs, UTM docs, and safety/disclosure guidance. TKEN is included only as a disclosed example endpoint: https://www.tken.shop/v1