fix: commit-msg hook grep -P를 -E로 변경 (macOS 호환)

.githooks/commit-msg

@@ -26,7 +26,7 @@ PATTERN='^(feat|fix|docs|style|refactor|test|chore|ci|perf)(\([a-zA-Z0-9가-힣.
 
 FIRST_LINE=$(head -1 "$COMMIT_MSG_FILE")
 
-if ! echo "$FIRST_LINE" | grep -qP "$PATTERN"; then
+if ! echo "$FIRST_LINE" | grep -qE "$PATTERN"; then
     echo ""
     echo "╔══════════════════════════════════════════════════════════════╗"
     echo "║  커밋 메시지가 Conventional Commits 형식에 맞지 않습니다   ║"