Add a root plugin.json manifest and move the skill to the canonical
skills/swiftui-expert-skill/ location per the Agent Plugins
specification (https://agent-plugins.org). A symlink at the old root
path keeps existing clones and scripts working until the next major
version.
Aligns all wrapper versions at 4.1.0 (agents/openai.yaml had drifted to
2.2.0), adds ChatGPT desktop interface metadata to the skill, and
updates the release workflow to bump every manifest.