New community skills: content-hash-cache-pattern, cost-aware-llm-pipeline,
regex-vs-llm-structured-text, swift-actor-persistence, swift-protocol-di-testing
* docs(zh-CN): sync Chinese docs with latest upstream changes
* docs: improve Chinese translation consistency in go-test.md
* docs(zh-CN): update image paths to use shared assets directory
- Update image references from ./assets/ to ../../assets/
- Remove zh-CN/assets directory to use shared assets
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Co-authored-by: neo <neo.dowithless@gmail.com>