[Task]: Add `Collection` tab to GalleryView

[MarkNerdi996]

Task description

On the NFT gallery view, we need a second tab, which includes all NFTs grouped together collection.
Each list item should contain a random image as a thumbnail, the collection name + how many NFTs are in this collection.

Requirements

• Add second tab to gallery view
• Show list of collections

Creation checklist

• I have assigned this task to the correct people
• I have added the most appropriate labels
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