Wires the existing @cursor/sdk skill (sourced from anysphere/everysphere
packages/cursor-sdk/skill/cursor-sdk) into the plugins marketplace as a
standalone cursor-sdk plugin: SKILL.md, the seven reference files
(runtime-choice, auth, error-handling, streaming, mcp, advanced, patterns),
plugin.json, README, LICENSE, and the marketplace.json + README.md entries.
Made-with: Cursor
roshansada