move Windows app to Windows folder, create folder for Web, create simplest web api service

Windows/Azaion.Annotator/Controls/UpdatableProgressBar.cs

@@ -0,0 +1,37 @@
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace Azaion.Annotator.Controls
+{
+    public class UpdatableProgressBar : ProgressBar
+    {
+        public delegate void ValueChange(double oldValue, double newValue);
+
+        public new event ValueChange? ValueChanged;
+
+        public UpdatableProgressBar() : base()
+        {
+            MouseDown += OnMouseDown;
+            MouseMove += OnMouseMove;
+        }
+        
+        private double SetProgressBarValue(double mousePos)
+        {
+            Value = Minimum;
+            var pbValue = mousePos / ActualWidth * Maximum;
+            ValueChanged?.Invoke(Value, pbValue);
+            return pbValue;
+        }
+
+        private void OnMouseDown(object sender, MouseButtonEventArgs e)
+        {
+            Value = SetProgressBarValue(e.GetPosition(this).X);
+        }
+
+        private void OnMouseMove(object sender, MouseEventArgs e)
+        {
+            if (e.LeftButton == MouseButtonState.Pressed)
+                Value = SetProgressBarValue(e.GetPosition(this).X);
+        }
+    }
+}