Add pool search and filter on explore page

[Ugasutun]

Description

Add search and filter functionality to the
pools explorer page.

Expected behavior

• Search by pool name or description
• Filter by Active/Closed status
• Filter by minimum XLM amount
• Sort by newest, most funded, deadline
• Results update instantly

Tech

• React state for filters
• Client-side filtering of pools array

[Codex723]

@Ugasutun I would like to work on adding search and filter functionality to the pools explorer page, including search by pool name or description, filtering by Active/Closed status and minimum XLM amount, and sorting by newest, most funded, or deadline. I'll implement this using React state with client-side filtering to ensure results update instantly.

[Ugasutun]

@Codex723 you have been assigned