v2.2.1-released

What's Changed

• feat: optimize requirements build by @e06084 in #359
• docs: add v2.1.0 poster by @e06084 in #361
• docs: add zhihu post by @e06084 in #362
• skills: add clawhub skill by @e06084 in #364
• skills: update clawhub by @e06084 in #365
• feat: refactor CLI to Agent-Native by @e06084 in #366
• feat: dingo CLI add MCP server by @e06084 in #367
• docs: update readme by @e06084 in #368
• docs: update readme by @e06084 in #369
• feat: delete dingo app demo code by @e06084 in #370
• add article fact checking skills for Claude and OpenClaw by @seancoding-day in #371
• release 2.2.0 by @e06084 in #372

Full Changelog: v2.1.0...v2.2.1