Add ability to trim and untrim XCI files from the application context menu AND in Bulk (#105)

src/Ryujinx/UI/Helpers/XCITrimmerFileSpaceSavingsConverter.cs

@@ -0,0 +1,48 @@
+using Avalonia;
+using Avalonia.Data;
+using Avalonia.Data.Converters;
+using Ryujinx.Ava.Common.Locale;
+using Ryujinx.UI.Common.Models;
+using System;
+using System.Globalization;
+
+namespace Ryujinx.Ava.UI.Helpers
+{
+    internal class XCITrimmerFileSpaceSavingsConverter : IValueConverter
+    {
+        private const long _bytesPerMB = 1024 * 1024;
+        public static XCITrimmerFileSpaceSavingsConverter Instance = new();
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is UnsetValueType)
+            {
+                return BindingOperations.DoNothing;
+            }
+
+            if (!targetType.IsAssignableFrom(typeof(string)))
+            {
+                return null;
+            }
+
+            if (value is not XCITrimmerFileModel app)
+            {
+                return null;
+            }
+
+            if (app.CurrentSavingsB < app.PotentialSavingsB)
+            {
+                return LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.TitleXCICanSaveLabel, (app.PotentialSavingsB - app.CurrentSavingsB) / _bytesPerMB);
+            }
+            else
+            {
+                return LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.TitleXCISavingLabel, app.CurrentSavingsB / _bytesPerMB);
+            }
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotSupportedException();
+        }
+    }
+}