feat: improve IconList layout with responsive columns

[ophirbucai]

Why

The icon list provides a way for users to navigate through supported icons. It currently supports only one column (implemented with a FlatList). On desktop, we can improve browsing experience by adding support for multiple column layout (grid-like), ensuring ample spacing between the items so they don't feel cramped together.

How

• [x] Adjust the number of columns based on the window's width using useWindowDimensions hook.
• [x] The FlatList key must be changed when numColumns is changed for the list to be rerendered, this doesn't cause any visual fluctuations.
• [ ] However, due to the key change, there could be room for scroll preservation, please let me know if this is required and I'll look into it.

https://github.com/user-attachments/assets/a6c09eae-13de-4a6f-9df6-49d562007d6f

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