feat: search items on the shelf

[0xneves]

Feature Request

Describe the Feature Request

The shelf has a search bar for its items. It is currently not implemented and we need to add this feature.

Definition of Done:

• Search on the shelf array for the names of the tokens based on the content type in the search box.
• The search box must trigger the search slightly after the user stopped to write. Just like in the big address search bar.
• The search box must have two contexts, one for "Your Items" and one for "Their Items". When changing tabs, what was searched should be preserved in both, the same for the resulting shelf array state based on the search.