close AF-2624, AF-2628, AF-2581
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a draggable handle to document cards in the explorer, visible on hover in card view.
- Added an option to remove grouping in the display menu.
- Added contextual tooltips for user avatars indicating creation or last update.
- Enabled optional tooltips on public user labels.
- Extended dropdown buttons to accept custom styling classes.
- Added a new masonry story showcasing item heights determined by ratios.
- **Style**
- Enhanced drag handle appearance and visibility for card view items.
- Replaced static shadows with theme-aware, smoothly transitioning shadows on card items.
- Adjusted spacing between items in the document explorer for improved layout, with increased horizontal and (in card view) vertical gaps.
- Reduced top padding in workspace page styles.
- Added new button background style for secondary buttons.
- **Bug Fixes**
- Removed duplicate internal property declarations to eliminate redundancy.
- **Refactor**
- Simplified layout props by removing fixed height parameters in multiple components.
- Updated masonry layout logic to support ratio-based item sizing alongside fixed heights.
- Removed randomized skeleton loading placeholders, replacing them with fixed or no placeholders.
- Refined masonry component typings and scrollbar placement for improved styling and layout.
- Improved selection logic to activate selection mode when selecting all documents.
- **Localization**
- Added new translation keys for grouping removal and user attribution tooltips.
- Updated English locale with new strings for "Remove group" and user-created/updated tooltips.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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