Improve emoji picker density and readability

[gabrielfordevelopment]

What happened?

Emoji items in the picker appear too small and spaced out, making them harder to scan and select. Adjust grid spacing, emoji sizing, and item rendering to create a denser, clearer picker that better matches the web experience.

[infi]

We cannot have any other amount than 9 items in a row inside the emoji picker due to the Google metadata:

The json files describe a grid layout for an emoji picker with 9 emoji per row

https://github.com/googlefonts/emoji-metadata

[gabrielfordevelopment]

Sure I know! Thank you for pointing it out! @infi I made a PR that deals with it in the way it is #107