### What problem does this PR solve?
feat(next-search): Implements document preview functionality
- Adds a new document preview modal component
- Implements document preview page logic
- Adds document preview-related hooks
- Optimizes document preview rendering logic
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: New search page components and features #3221
- Added search homepage, search settings, and ongoing search components
- Implemented features such as search app list, creating search apps,
and deleting search apps
- Optimized the multi-select component, adding disabled state and suffix
display
- Adjusted navigation hooks to support search page navigation
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
