Added file info extensions

app/MindWork AI Studio/Tools/FileInfoExtensions.cs

@@ -0,0 +1,21 @@
+namespace AIStudio.Tools;
+
+public static class FileInfoExtensions
+{
+    public static string FileSize(this FileInfo fileInfo)
+    {
+        if (!fileInfo.Exists)
+            return "N/A";
+
+        var size = fileInfo.Length;
+        string[] sizes = { "B", "kB", "MB", "GB", "TB" };
+        var order = 0;
+        while (size >= 1024 && order < sizes.Length - 1)
+        {
+            order++;
+            size /= 1024;
+        }
+
+        return $"{size:0.##} {sizes[order]}";
+    }
+}