Enum representing the different shimmer animations for the skeleton.

• Fade - Creates a fading opacity animation that alternates between more and less visible states, providing a subtle pulsing animation.
• None - Disables animation effects, showing a static shimmer placeholder without any movement or transition.
• Pulse - Applies a pulsing animation that changes the opacity or intensity of the shimmer element in a rhythmic pattern.
• Wave - Animates a wave-like gradient that moves across the shimmer element, creating a smooth flowing animation from one side to the other.

Defines the available variant types for skeleton loading placeholders. These placeholder variants represent different UI elements during loading states.

• Circle - Represents a circular placeholder, suitable for avatars, profile pictures, icons, or other circular UI elements.
• Rectangle - Represents a rectangular placeholder with different width and height dimensions, suitable for cards, images, buttons, or other non-square UI elements.
• Square - Represents a square placeholder with equal width and height, suitable for buttons, icons, or thumbnails with 1:1 aspect ratio.
• Text - Represents a text line or paragraph placeholder with rounded corners, suitable for displaying loading states for textual content.