Added small system overview

Moonlight.Frontend/Formatter.cs

@@ -0,0 +1,46 @@
+namespace Moonlight.Frontend;
+
+public static class Formatter
+{
+    public static string FormatSize(long bytes, double conversionStep = 1024)
+    {
+        if (bytes == 0) return "0 B";
+    
+        string[] units = ["B", "KB", "MB", "GB", "TB", "PB", "EB"];
+        var unitIndex = 0;
+        double size = bytes;
+    
+        while (size >= conversionStep && unitIndex < units.Length - 1)
+        {
+            size /= conversionStep;
+            unitIndex++;
+        }
+    
+        var decimals = unitIndex == 0 ? 0 : 2;
+        return $"{Math.Round(size, decimals)} {units[unitIndex]}";
+    }
+    
+    public static string FormatDuration(TimeSpan timeSpan)
+    {
+        var abs = timeSpan.Duration(); // Handle negative timespans
+    
+        if (abs.TotalSeconds < 1)
+            return $"{abs.TotalMilliseconds:F0}ms";
+    
+        if (abs.TotalMinutes < 1)
+            return $"{abs.TotalSeconds:F1}s";
+    
+        if (abs.TotalHours < 1)
+            return $"{abs.Minutes}m {abs.Seconds}s";
+    
+        if (abs.TotalDays < 1)
+            return $"{abs.Hours}h {abs.Minutes}m";
+    
+        if (abs.TotalDays < 365)
+            return $"{abs.Days}d {abs.Hours}h";
+    
+        var years = (int)(abs.TotalDays / 365);
+        var days = abs.Days % 365;
+        return days > 0 ? $"{years}y {days}d" : $"{years}y";
+    }
+}