Initial upload with CI/CD workflow

shellhist/utils/__init__.py

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+"""CLI utilities for formatting and display."""
+
+from datetime import datetime
+from typing import Optional
+
+
+def format_timestamp(ts: Optional[datetime]) -> str:
+    """Format a datetime for display."""
+    if ts is None:
+        return "unknown"
+    return ts.strftime("%Y-%m-%d %H:%M:%S")
+
+
+def format_duration_hours(hours: float) -> str:
+    """Format duration in hours to human readable format."""
+    if hours < 1:
+        return f"{int(hours * 60)}m"
+    elif hours < 24:
+        return f"{int(hours)}h"
+    else:
+        return f"{int(hours / 24)}d"