Drop 'Cursor' from plugin descriptions in the marketplace manifest and
per-plugin manifests so they read correctly in any agent client, and
resync the README table that mirrors them.
Co-authored-by: Alex Vandak Maloney <maloney.a12@gmail.com>
Circleback ships an official remote MCP server over Streamable HTTP with
OAuth and Dynamic Client Registration, so the plugin is a URL-only
mcp.json with no variables block.
Co-authored-by: Cursor <cursoragent@cursor.com>