## ScrollBar
The ScrollBar widget allows users to navigate through content that overflows the visible area, either horizontally or vertically.

### Attributes
- axis (ScrollAxis)
- bar_side_margin (float)
- bar_size (float)
- min_handle_size (float)
- smoothing (float)
- use_vertical_finger_scroll (bool)

### Styling Attributes
#### draw_bg
- color (Color)
- color_hover (Color)
- color_drag (Color)
- border_size (float)
- border_radius (float)
- border_color (Color)
- border_color_hover Color()
- border_color_drag (Color)
- size (float)

## ScrollBars

### Attributes
- scroll_bar_x (ScrollBar)
- scroll_bar_y (ScrollBar)
- show_scroll_x (bool)
- show_scroll_y (bool)