docs(i18n): cookbook batch — six bilingual pairs via the committed pipeline

六篇 cookbook 全部配对（adding-a-package / adding-a-tool /
adding-a-vendored-package / adding-an-llm-adapter /
extension-cookbook / responding-to-pr-review-on-a-stack）：译文由
进仓流水线产出（translation-prompt.md 全占位符渲染 + 5 组金标
few-shot），双侧语言切换行齐备，六篇加入 manifest required（15）。
另补 prompt 的 When translating into English 一节（此前为占位）：
标点/术语双向绑定/主语显化/惯用语概念还原/语域，与
translation-rules 的中文先行条款一致。

docs/i18n/translation-prompt.md

@@ -79,6 +79,11 @@ You are a senior technical translator specializing in LLM and agent development
 
 #### When translating into English
 - Use half-width English punctuation and standard English spacing. Preserve full-width punctuation only in verbatim Chinese text.
+- Convert enumeration commas (、) to English commas; convert 「」 quotes to English double quotes.
+- Render the terminology table's English column the same way the Chinese column binds the other direction: listed terms use exactly the table's English form; first-occurrence glosses do not carry over (English prose never glosses an English term with Chinese).
+- Chinese topic-comment sentences and dropped subjects become explicit English subjects; prefer concise declaratives over nominalizations.
+- Do not transliterate Chinese engineering idioms literally: render the underlying concept (误报 → false positive, 执行红线 → enforcement frontier), consulting the terminology table first.
+- Keep the register of institutional developer documentation: contractions are acceptable, marketing language and hedging (very, quite, simply) are not.
 
 ## Terminology