Claude Code discovers MCP servers via .claude-plugin/plugin.json inside
each plugin directory. The existing .codex-plugin/ manifest only works
for Codex CLI. Add the Claude Code-specific manifest with inline
mcpServers config, and also declare mcpServers in the root marketplace
manifest entry for belt-and-suspenders coverage.
Fixes#840
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Abhitej John