Publish and download WeChat Public Platform content and Baijiahao articles via a local CLI.
- Added new commands: `wechat:stats:cumulate` for user statistics and `wechat:stats:bizsummary` for published content statistics. - Extended documentation with examples for querying statistics and date ranges. - Updated Notes to describe new statistics commands and their limitations (server-side only, max 30 days). - No code changes; documentation and usage instructions improved.