Add `search +recommend`, listing the platform's recommended/featured
projects via GET /api/projects/recommend — a discovery endpoint that had
no shortcut coverage. The endpoint returns a bare JSON array; the command
normalizes it into structured data for clean output.
Includes unit tests, bilingual (en-US/zh-CN) help text, README updates,
and a change note. Verified against production gitlink.org.cn.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>