Feature improvement

[UmangPandav]

I tested your package, and it works well. However, I noticed some areas where improvements can be made:

1. Update CNPopupMenuButton to accept a BuildContext so the popup can be shown using the provided widget context.
2. Replace the buttonLabel parameter with a child option, allowing dynamic widgets instead of just text.
3. Add support for an icon parameter (similar to buttonLabel) for more flexibility.
4. Allow the use of IconData for icons (e.g., Icons.favorite) instead of being restricted to string-based values like 'heart.fill' or 'house.fill'.
5. Add more widgets with liquid glass effects (if available) to enhance UI options.
6. Can you make this works also on android?

[NarekManukyan]

#8 @vlidholt