Agent2RSS - AI Content to RSS Feed

**Changelog for agent2rss 0.2.1**

- Added three new files: `.clawhub/origin.json`, `_meta.json`, `references/.DS_Store`.

- Clarified security instructions in documentation: explicit warnings about serverUrl trust and token file location.

- Changed default behavior: `init` no longer auto-creates a default channel

users must explicitly create channels.

- Updated documentation for clearer usage, safety recommendations, and path conventions.

- Separated network access details and common error handling for better transparency.

- Revised trigger word list in the description (now omits “上传文章/幂等性” and reorders triggers).