feat: implement arrangement and dragging

src/Ursa/Controls/RangeSlider/RangeValueChangedEventArgs.cs

@@ -0,0 +1,34 @@
+using Avalonia.Interactivity;
+
+namespace Ursa.Controls;
+
+public class RangeValueChangedEventArgs: RoutedEventArgs
+{
+    public double OldValue { get; set; }
+    public double NewValue { get; set; }
+    public bool IsLower { get; set; }
+
+    public RangeValueChangedEventArgs(
+        RoutedEvent routedEvent, 
+        object source, 
+        double oldValue, 
+        double newValue,
+        bool isLower = true) : base(routedEvent, source)
+    {
+        OldValue = oldValue;
+        NewValue = newValue;
+        IsLower = isLower;
+    }
+    
+    public RangeValueChangedEventArgs(
+        RoutedEvent routedEvent, 
+        double oldValue, 
+        double newValue,
+        bool isLower = true) : base(routedEvent)
+    {
+        OldValue = oldValue;
+        NewValue = newValue;
+        IsLower = isLower;
+    }
+
+}