Bookmarks Feature Refactoring and Bug Fixes

[seabornlee]

Task/Issue URL: #6062

Description

This PR refactors the bookmarks feature to improve code quality and fix several bookmark-related bugs. Key changes include:

• Refactoring:

  • Extracted BookmarksSearchActivity to separate search functionality
  • Created HiddenIdsManager to eliminate code duplication

• Bug Fixes:

  • Fixed deleted bookmarks still appearing in search results
  • Fixed deleted bookmarks not being hidden properly
  • Fixed child item count updates
  • Fixed deletion of items in search activity

• Testing:

  • Added Maestro tests for bookmark functionality
  • Added unit tests for new components

Steps to test this PR

Bookmark Management

• Create, edit and delete bookmarks
• Verify deleted bookmarks don't appear in search results
• Add and rem^Cove favorites
• Edit bookmark location and folder

Bookmark Search

• Search for bookmarks
• Verify folder management works correctly during search
• Verify deleted items are immediately removed from search results

Folder Management

• Create, edit and delete folders
• Verify child item counts update correctly

UI changes

Before	After
Can search in only sub folder	Can search in root bookmark folder

[seabornlee]

@CDRussell @joshliebe @nalcalag Could you please take a look at this?