Fix 9 design majors: ITrackService interface, IsDescending, ArrayPool base, CliUtils, sort sentinel cleanup, content controller via TrackService, Skip property

DeepDrftCli/Utils/CliUtils.cs

@@ -0,0 +1,16 @@
+namespace DeepDrftCli.Utils;
+
+internal static class CliUtils
+{
+    /// <summary>
+    /// Truncates a string to fit within the specified column width,
+    /// appending "..." when the string is longer.
+    /// </summary>
+    internal static string TruncateString(string input, int maxLength)
+    {
+        if (string.IsNullOrEmpty(input))
+            return string.Empty;
+
+        return input.Length <= maxLength ? input : input.Substring(0, maxLength - 3) + "...";
+    }
+}