enhancement: improve gallery view UI

[MarkNerdi996]

Summary

This PR updates the current implementation of the GalleryView to the figma designs.

Changelog

- add NFT amount to title
- fix font size and weights of title + nft names
- fix border + bg color of nft items
- fix some margins

Relevant Issues

Closes #3442

Testing

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[jeeanribeiro]

Light mode looks good to me

In dark mode I can't see the NFT title

[jeeanribeiro]

LGTM!