Implement explorer

Summary by CodeRabbit

• New Features

  • Rebranded the “Discover/Search” functionality to “Explore” with updated navigation labels, icons (now a compass), and routes.
  • Launched a new Explore page featuring tabs for Posts, Trends, and Accounts, an interactive welcome card, and enhanced filtering options.
  • Introduced a popular accounts carousel for smoother account discovery.

• Style

  • Upgraded visual styling with new shadow effects to improve the overall aesthetics.