• Introduced a new preview feature for taskbar widgets that displays window thumbnails.
• Added configuration options for preview settings including width, delay, padding, and margin.
• Implemented a TaskbarThumbnailManager to manage thumbnail creation and display.
• Enhanced DraggableAppButton to trigger previews on hover.

Options:

preview: 
  enabled: true
  width: 300 # The width of the preview thumbnail in pixels.
  delay: 200 # The delay in milliseconds before showing the preview after hovering over an application icon.
  padding: 8 # The padding around the preview thumbnail in pixels.
  margin: 8 # The margin between the preview thumbnail and the taskbar in pixels.

Note:
When preview is enabled tooltip are automatically disabled to avoid overlap.

Taskbar preview popup is very limited in styling options, do not use margins/paddings here

.taskbar-preview {
    border-radius: 8px; 
    background-color:#2b2c2d; 
}
.taskbar-preview .header {
    padding-bottom: 12px;
    padding-top: 4px;
}
.taskbar-preview .header .title {
    color: #d6d6d6;
    font-family: "Segoe UI";
    font-weight: 600;
    font-size: 13px;
}