docs(skills): add skill-translate for multilingual translation triggers

- Trigger phrases: 번역, translate, language conversion
- Do/Do-not guidance for tone and no extra commentary

Made-with: Cursor

skills/skill-translate/SKILL.md

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+---
+name: skill-translate
+description: Translate text between languages. Triggers on 번역해줘, translate this, 영어로 바꿔줘, ~를 한국어로.
+---
+# skill-translate
+## Trigger
+- User asks to translate text to another language
+- Keywords: 번역, translate, ~로 바꿔, ~로 변환, in English, in Korean
+## Do
+- Translate the given text to the target language
+- Preserve formatting and tone
+- Support: Korean, English, Japanese, Chinese
+## Do Not
+- Do not add explanations unless asked
+- Do not modify the original meaning