fix: improve emoji picker spacing and emoji sizing

[gabrielfordevelopment]

closes #116

Reduced emoji picker grid gaps and increased emoji visual size for better readability. Kept layout compact and improved custom emoji fit so the picker feels denser and clearer.

• Emoji items in the picker currently appear too small and too far apart, which makes them harder to scan and select, especially on smaller screens.
• This update brings spacing and sizing closer to the web experience for better cross-platform consistency.
• The result is a denser, clearer picker that improves quick navigation and emoji selection without changing core behavior.
• Removed clip(CircleShape) from emoji picker items to fix edge clipping artifacts and improve rendering consistency. (It was not visible to shape emoji items)

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Video example

Currently we have this:

1000017595.mp4

Whate I made have this:

1000017594.mp4

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Screenshots