add function to manage taskbar item

changed from manually setting the taskbar overlay, progressvalue and progress state to setting them through a function

functions/private/Set-WinUtilTaskbarItem.ps1

@@ -0,0 +1,63 @@
+    <#
+
+    .SYNOPSIS
+        Modifies the Taskbaritem of the WPF Form
+
+    .PARAMETER state & value
+        Value can be between 0 and 1, 0 being no progress done yet and 1 being fully completed
+        State can be 'None' > No progress, 'Indeterminate' > Without value, 'Normal' > when using value, 'Error' > Red (when using value), 'Paused' > Yellow (when using value)
+
+    .PARAMETER overlay
+        Overlay icon to display on the taskbar item
+
+    .EXAMPLE
+        Set-WinUtilTaskbaritem -value 0.5 -state "Normal"
+        Set-WinUtilTaskbaritem -state "Error"
+        Set-WinUtilTaskbaritem -state "None"
+        Set-WinUtilTaskbaritem -state "Indeterminate"
+        Set-WinUtilTaskbaritem -overlay "C:\path\to\icon.ico"
+
+    #>
+
+
+function Set-WinUtilTaskbaritem {
+    param (
+        [double]$value,
+        $state,
+        $overlay
+        #[string]$description
+    )
+
+    if ($value) {
+        $sync["Form"].taskbarItemInfo.ProgressValue = $value
+    }
+
+    if ($state) {
+        $sync["Form"].taskbarItemInfo.ProgressState = $state
+    }
+
+    if ($overlay -and (Test-Path $overlay)) {
+        # Read the image file as a byte array
+        $imageBytes = [System.IO.File]::ReadAllBytes($overlay)
+
+        # Convert the byte array to a Base64 string
+        [System.Convert]::ToBase64String($imageBytes)
+
+        # Load the image file as a bitmap
+        $bitmap = [System.Drawing.Bitmap]::new($overlay)
+
+        # Create a streaming image by streaming the bitmap to a memory stream
+        $memoryStream = [System.IO.MemoryStream]::new()
+        $bitmap.Save($memoryStream, [System.Drawing.Imaging.ImageFormat]::Png)
+        $memoryStream.Position = 0
+
+        # Create a bitmap image from the memory stream
+        $bitmapImage = [System.Windows.Media.Imaging.BitmapImage]::new()
+        $bitmapImage.BeginInit()
+        $bitmapImage.StreamSource = $memoryStream
+        $bitmapImage.EndInit()
+        $bitmapImage.Freeze()
+
+        $sync["Form"].taskbarItemInfo.Overlay = $bitmapImage
+    }
+}