fix: restore file permissions to 644

refactor: add OpenCode-specific rules structure (#27)

Merge pull request #26 from iceflower/refactor/add-opencode-rules-structure

Merge pull request #25 from iceflower/docs/add-chinese-japanese-kanji-mixed-violation

docs: add Chinese/Japanese Kanji mixed violation case for '最佳的 컨벤션'

docs: clarify Korean language rules with immediate correction and enforcement (#24)

docs: add CJK Mixed Language Prohibition rule (#23)

docs: language-violation-examples.md 중국어/영어 혼용 위반 사례 추가 (#22)

fix: language-violation-examples에 한국어 혼합 사용 위반 사례 추가 (#21)

docs: extract language violation examples to references (#20)

docs: slim down §2 Information Accuracy by extracting details to references (#19)

docs: define global vs project-level rule precedence (#18)

docs: add error handling essentials to Code Quality section (#17)

docs: add testing behavior rules to Code Quality section (#16)

docs: 중국어 단어 혼용 위반 예시 추가 (#10)