Function SelectImageTaskDialog

SelectImageTaskDialog(filename: string, DIR: string): Promise<void>
Displays a dialog to select an image processing task.

This function presents a menu to the user, allowing them to choose between optimizing an image, converting an image, returning to the utility menu, or quitting.
Parameters
- filename: string
  The name of the file being processed.
- DIR: string
  The directory where the file is located.
Returns Promise<void>